Ages 6–7🧮 MathematicsBeing planted

Grouping numbers to add

Understand and apply the associative property of addition: when adding three numbers, any two can be added first

A first look

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Question 1 of 3

You need to find the total of 7 + 5 + 3. Which grouping lets you add two numbers first to make a round number, making the problem easier?

Question 2 of 3

What is the total of 2 + 6 + 4 if you first add the numbers 6 and 4 together?

Question 3 of 3

Lily is counting her craft supplies: 12 beads, 8 stickers, and 4 ribbons. Which way should she add the numbers first so that the first addition makes a round number, making the counting quicker?

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