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God is the Creator of a universe that is carefully ordered. Learning to calculate accurately shows integrity and shows order. We show perseverance when we try many different strategies in order to work things out.
Lesson One
Lesson One
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
Have a go at this number sentence. You can use each number as often as you like.
See how many different solutions you can come up with.
Task Two
Task Two
(This lesson comes from naturalcurriculum.co.uk)
‘Armadillo’ means ‘little armoured one’ in Spanish. The overlapping bony plates that cover much of an armadillo’s body not only give this fascinating mammal its unusual appearance, but they also help to protect it from the bites and stings of predators. There are 20 different species of armadillo and most of them are superb diggers. An armadillo will use its powerful front claws to dig and it can spend up to 18 hours a day asleep in its burrow.
How many hours a day do you sleep? How many more hours a day does an armadillo sleep than you do?
Here is a short video clip of an armadillo.
Task Three
Task Three
Armadillos live in a burrow. The burrow is nicknamed ‘Hotel Armadillo’. This is because, just like a hotel, once the armadillo has ‘moved out’, the burrow provides shelter for lots of different animals. Which animals do you think might visit Hotel Armadillo?
The Problem
The Problem
The following animals often use an armadillo burrow for shelter, warmth and protection:
fox (3)
ocelot (6)
tortoise (8)
anteater (8)
armadillo (9)
If three different animals from the list above visit an armadillo burrow, what might the total number of letters in their names be?
You’ll notice in the picture opposite that the number 30 appears next to the entrance of Hotel Armadillo. This is the total number of letters in all of the animals that visited this particular burrow.
Can you work out which animals, from the list above, visited Hotel Armadillo?
Note: They don’t all have to visit the burrow, and you can have more than one type of animal visiting. How will you know if you have found all possible solutions?
Here is a working out sheet to help you.
Hotel-armadillo-worksheet.pdfLesson Two
Lesson Two
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task 1
Task 1
See how many different ways you can solve this problem.
Show how you could work out the answer to this question by using a hundreds chart and a number line.
Task Two
Task Two
Here are two models showing different ways of working out addition questions.
Complete some addition questions using a number chart.
Jump strategy using a number chart worksheet.pdfJump strategy using number charts.pdfNow have a go at some addition questions using jumps on a number line.
Jump strat addn tens.pdfjump strat addn 10-20.pdfYour teacher or a partner can give you some two digit addition questions for you to complete on this empty number line. Write the biggest number at the beginning of the line and then make your jumps.
Empty Number lines for Jump strategy addition.pdfJump strat addition no number line + tens.pdfJump strat addtn empty number line.pdfJump strat addtn empty number line 2.pdfLesson Three
Lesson Three
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
See how many different solutions you can come up with.
Task Two
Task Two
Have a look at the question below, and solve it using the jump strategy as we used it a couple of lessons ago.
To think about and discuss
To think about and discuss
Could you use the jump strategy if your teacher didn't give you a number line?
Do you need a full number line or could you make your own number line? Could you do jump strategy on a blank piece of paper?
Now click through these slides to remind yourself of how the jump strategy works.
Task Three
Task Three
Continue working on the worksheets from yesterday's lesson. When you have finished you can have a go at completing these questions using the jump strategy.
Questions - Part 1
34 + 28 =
54 + 24 =
61 + 38 =
86 + 25 =
77 + 38 =
128 + 16 =
Part 2 - When you have finished, try these:
243 + 125 =
354 + 232 =
Part 3
Now create a jump strategy addition question that would have the answer 142.
Teacher note
Teacher note
For differentiation, empty number lines (as below), no number lines to students as required etc. Move students on from matching number lines to empty number lines if they are ready to cope. If they are still struggling, then give them more dedicated jump strategy practice.
For further extension, supply students with tasks requiring 3 digit addition!
Number lines 1- 50.pdfJump strat empty number line 3.pdfLesson Four
Lesson Four
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
See how many different solutions you can come up with.
Task Two
Task Two
The Year 4 classrooms and located on the top floor of their building. If there were 24 steps to get from the bottom floor to the first floor, and 25 steps to get from the first floor to the top floor, how many steps do the Year 4 students need to climb to get from the play area outside Primary Admin to get to their classrooms?
Show how you can solve this in a way that doesn't use Jump Strategy or counting on your fingers.
Teacher note
Teacher note
What we are looking for here in the debrief, is for someone who has used the Split strategy to solve this question - 20 + 20 = 40 and then 4 + 5 = 9, therefore the answer is 49.
Then show this google slides presentation. You will need to open it fully, then Open with Google slides, and then click slideshow, and then use your arrows to step through it so that you can show the transitions appropriately.
Task Three
Task Three
Click through these two presentations, and watch how the numbers are split apart, or pulled apart.
Watch the following demonstration as a slideshow in Google Slides.
Split Strategy demonstration.pptxTask Four
Task Four
Complete one of the following Split strategy addition worksheets.
Teacher Note
Teacher Note
These worksheets are differentiated. Split strategy A is limited to 2 digit numbers, Split strategy is a combination of 2 and 3 digit numbers. If any students are really struggling, let them work through the slide show below.
Addition split strategy to 50.pptxSplit strategy A.pdfSplit strategy 2 & 3 digit.pdfTask Five
Task Five
When you have finished, explain whether this question has been answered correctly or not. If it is wrong, show how you know, and how to fix it up.
164 + 207 = 100 + 200 = 300
60 + 7 = 67
4 + 7 = 11
Answer: = 378
Lesson Five
Lesson Five
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
See how many different solutions you can come up with.
Task Two
Task Two
Find the answer to this question using the Split strategy.
Task Three
Task Three
When we use the Split strategy, we always remember that numbers are made up of hundreds, tens and ones, and we use this to split up or partition numbers.
We can explain this in different ways - review your understanding by looking carefully at these slides.
Split strat addn 3 digit.pptxTask Four
Task Four
If you would like more practice on yesterday's worksheets, please continue working on them. If you feel confident, then give a partner some 3 digit addition number sentences for them to work out, and they should do the same for you.
Task Five
Task Five
Create your own addition question using 4 digit numbers and show how you would solve it.
Could you use this pattern for a 5 or 6 digit number? Explain.
Lesson Six
Lesson Six
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
How many different ways can you solve this?
Task Two
Task Two
Your teacher will lead you through the Gummy Worms lesson.
Lesson Seven
Lesson Seven
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
Task Two
Task Two
Think back to last week when we used a number line and the jump strategy to answer addition problems. Do you think we could use a similar strategy for subtraction?
Using the number lines provided try solving the two problems below.
There are 23 biscuits in Milo the dog's treat box. His owner gives him 8. How many are left?
During the holidays, Susan planted 32 flowers in the garden. Her mother gave away 14 of them. How many plants are left?
0-50-on-a-number-line.pdfTask Three
Task Three
For more practice, your teacher will ask you to complete one of the following sheets. There is an example poster to remind you how to use the jump strategy for subtraction.
Teaching notes
There are a range of activities here for this lesson, which you can use according to your professional judgement as to who needs more structured practice and who needs more extension. Task Four is a good one to check for understanding.
Jump Strat subtraction.pdfJump-Strategy-for-Subtraction.pdfTask Four
Task Four
Carl likes video games and ended up buying two games - one was new and cost $58, the other was a used game which cost $39. He says that he saved $21 - that the used game cost $21 less than the new game. Is he correct? Explain how you know you are correct.
If you have time, create a word problem of your own and show how to solve it using one of the spare number lines.
Lesson Eight
Lesson Eight
Learning content:
Learning content:
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
uses mental and written strategies for addition and subtraction involving 2-, 3-, 4- and 5- digit numbers
checks the accuracy of a statement and explains the reasoning used
checks the accuracy of a statement and explains the reasoning used
Task One
Task One
Here is a fun challenge to work on with a buddy. There are two numbers to find. This time, there is only one correct answer for each. Remember to check that your answer fits every rule.
Task Two
Task Two
Watch this video clip. What do you notice? What does it make you wonder about?
Do you have any questions or anything that wonder about after seeing this video?
Turn and talk to a partner about your thinking.
How many cookies did the cookie monster eat?
Write an estimate that it too high, and one that it too low?
Now look at the slides below and decide how close your estimate is to the real number of cookies that the cookie monster ate?
Draw/write/show your explanation of what you did and explain your answer.
Teacher Note
Teacher Note
Reveal these slides gradually - to add information to help support students, but not depriving them of the "struggle"!
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