Math · Ages 6–8 · 12 minutes

Number Bonds to 20: Compare Two Ways

This page asks learners to reason about two different splits of one whole and describe what changes and what stays the same.

Student name

BrightPath

Name:
Date:

Today I am practising: comparing equivalent decompositions of the same number

14 is 8 + 6 and 10 + ___. Fill the blank.

Compare 15 = 7 + 8 and 15 = 9 + 6. Which bond has the larger first part?

16 = 8 + 8. Write a different two-part bond for 16.

20 = 12 + 8. Change one part by 1. What must happen to the other part?

13 = 5 + 8. Is 13 = 8 + 5 also true? Explain.

Draw two different number bonds for 18 and write one thing they share.

Grown-up note: Ask your learner to explain one answer in their own words.

For the grown-up

How to teach this page

Step 1Invite the child to use counters for the first comparison, then move to symbols.
Step 2Use the words 'whole stays the same' repeatedly.
Step 3Accept an oral explanation before asking for a written sentence.