exponents-t1

Walt: Use our knowledge of 2s, 3s, 5s and 10s to help us solve harder multiplication and division problems

Use skip counting - 2, 4, 6, 8, 10...

Repeated addition - 2+2+2+2+2=....

Or know facts I know that 5 x 2=10 and this looks different to 2x5=

Activity

Walt: Use our knowledge of 2s, 3s, 5s and 10s to help us solve harder multiplication and division problems

Use skip counting - 2, 4, 6, 8, 10...

Repeated addition - 2+2+2+2+2=....

Or know facts I know that 5 x 2=10 and this looks different to 2x5=

2s, 3s, 5s, and 10s

Walt: Use more than one strategy to solve number problems

Strategies that we have learned:

Place Value: Adding the tens and adding the ones

Example: Shelley has 38 marbles and collects another 25 more. How many does she have altogether? 30+20=50, 8+5=13, 50+13=63

Tidy Numbers: Take 2 from 25 and add it to the 38 to make 40 (a tidy ten). 25-2=23, so add 40+23=63

Equal Addition: David has $85. He bought a pair of new shoes that cost $28. How much money does he have left?

Add 2 to 28 to make 30. Remember: what you add to one side you must to another. This only works, when the number being subtracted ends with 7, 8 or 9.

Add 2 to 85 to make 87. So, 87-30=57. So the answer is: 57

Reversibility: Instead of subtracting - ADD

28+ __=85

28+7=35

35+50=85 the answer is 57. The numbers are in the middle.

Activity One

Walt: Add and subtract in parts to solve number problems

Tidy Tens: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.. any number that ends with zero (0)

Example:

Teija has 36 marbles. She wins 5 more at school. How many marbles does she have altogether?

Split 5 into 4 and 1. Add 4 to 36 to make it 40 (a tidy ten) then add the 1 so the answer is 41.

Adding in Parts Subtract in Parts

Walt: Use more than one strategy to solve number problems

Strategies to use include:

Adding Tens and Ones

Making Tidy Numbers

Solving Number Problems

Walt: Recognise and identify simple number patterns

Instructions Make a copy and complete your activity

Post your activity to your blog with 2-3 sentences that explain your learning

Links Exponents Number Patterns