3rd Grade Math
Skills to Know
Operations and Algebraic Thinking
Know from memory the sums of all one-digit numbers (e.g., 9+9, 9+8, 9+7, 9+6, etc.)
Use addition and subtraction within 100 to solve one and two-step word problems
Identify numbers as odd or even
Use addition to find the total number in an array and write an equation to express the total
Number and Operations in Base Ten
Practice basic addition and subtraction facts
Compare three-digit numbers using <, >, and = symbols
Add up to four two-digit numbers
Add and subtract within 1,000
Measurement and Data
Understand how to represent whole-number sums and differences on a number line diagram
Practice telling and writing time from analog and digital clocks to the nearest five minutes
Solve word problems involving money (e.g., If you have 2 dimes and 3 pennies, how many cents do you have?)
Geometry
Practice dividing circles and rectangles into halves, thirds, and fourths
Understand that one whole is made up of two halves, three thirds, four fourths, etc.
Activities to Try
Operations and Algebraic Thinking
Marla drew 3 rows of stars with 4 stars in each row. What is the repeated addition equation that could show this problem? How could she continue this pattern to show 28 stars? What is the new addition equation?
Use a timer to determine how long it takes you to write all of the addition facts with a sum of 20. Practice to get a better time next week.
Use the digits 3, 4, and 9 to write the largest even number that you can. Is this the largest number that can be made with these three digits? Explain your answer.
Number and Operations in Base Ten
Compare the cost of two items (e.g., a bicycle and a Nintendo Switch) Use the newspaper or computer to research the costs. Write a description of your findings.
Write a word problem that uses repeated addition and the sum is 18.
Jack’s beanstalk was 3 centimeters high when he measured it on July 17. On July 18, the beanstalk was 6 cm high. The beanstalk doubles its height every day. What will be the height on July 22?
Measurement and Data
A beaver is 15 inches long. It grows 23 inches. How long is the beaver now? Create a number line to solve this problem. Then create your own story problem and solve it using a number line.
Create a schedule of your activities for the day. Use a clock to determine the time you start and end each activity. Remember to start with the time you woke up.
Read a book from the math book list. Record the time you start and stop reading. Use a.m. or p.m. correctly.
A toy costs 65¢. Rae buys the toy and gets 10¢ back in change. What three coins did Rae use to pay for the toy? Explain your answer.
Geometry
Create a rectangular cake by drawing a picture or using Play-Doh. Imagine you are sharing the cake with your family, and they are each going to get an equal piece. What fraction of the cake would each person get? Practice dividing the cake into halves, thirds, and fourths. Create a circular cake. Practice dividing the cake into halves, thirds, and fourths. What fraction would each person get? Use pictures and words to explain your answer.
Math Resources
Prodigy
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