Number bonds printable: to 10, 20 and 100
Number bonds are pairs that make a total. Print these cards after a short oral warm-up so the paper practice feels like a check, not the first exposure.
Prefer a live breakdown? Open the Number Blocks Tool or play the Number Blocks Generator first, then print.
Bond practice numbers
Use each card, then ask the matching bond question in the tips.
Bond to 10: 7 + ? — number 7
Practice card for 7
Six questions with answers for 7: place value, expanded form, odd or even, prime or composite, factor pairs, and ±10. Print it, or pick any other number in the Number Blocks Tool.
- How many tens are in 7? ____
- Write 7 in expanded form. ____________
- Is 7 odd or even? How do you know? ____________
- Is 7 prime or composite? ____________
- Write one factor pair of 7. ____________
- What is 7 + 10? ____ What is 7 - 10? ____
Answers
Answers
- 0 tens (and 7 ones).
- 7
- Odd: it ends in 7, so one is left over when you make pairs.
- Prime: only 1 and itself.
- 1 × 7.
- 17 and -3 (below zero).
numblocksgen.com/number-blocks-tool/
Bond to 20: 12 + ? — number 12
Practice card for 12
Six questions with answers for 12: place value, expanded form, odd or even, prime or composite, factor pairs, and ±10. Print it, or pick any other number in the Number Blocks Tool.
- How many tens are in 12? ____
- Write 12 in expanded form. ____________
- Is 12 odd or even? How do you know? ____________
- Is 12 prime or composite? ____________
- Write two factor pairs of 12. ____________
- What is 12 + 10? ____ What is 12 - 10? ____
Answers
Answers
- 1 ten (and 2 ones).
- 10 + 2
- Even: it ends in 2, so it splits into two equal groups of 6.
- Composite: 12 has 6 factors.
- Any two of 1 × 12, 2 × 6, 3 × 4.
- 22 and 2.
numblocksgen.com/number-blocks-tool/
Bond to 100: 40 + ? — number 40
Practice card for 40
Six questions with answers for 40: place value, expanded form, odd or even, prime or composite, factor pairs, and ±10. Print it, or pick any other number in the Number Blocks Tool.
- How many tens are in 40? ____
- Write 40 in expanded form. ____________
- Is 40 odd or even? How do you know? ____________
- Is 40 prime or composite? ____________
- Write two factor pairs of 40. ____________
- What is 40 + 10? ____ What is 40 - 10? ____
Answers
Answers
- 4 tens.
- 40
- Even: it ends in 0, so it splits into two equal groups of 20.
- Composite: 40 has 8 factors.
- Any two of 1 × 40, 2 × 20, 4 × 10, 5 × 8.
- 50 and 30.
numblocksgen.com/number-blocks-tool/
Bond to 100 with ones: 65 + ? — number 65
Practice card for 65
Six questions with answers for 65: place value, expanded form, odd or even, prime or composite, factor pairs, and ±10. Print it, or pick any other number in the Number Blocks Tool.
- How many tens are in 65? ____
- Write 65 in expanded form. ____________
- Is 65 odd or even? How do you know? ____________
- Is 65 prime or composite? ____________
- Write two factor pairs of 65. ____________
- What is 65 + 10? ____ What is 65 - 10? ____
Answers
Answers
- 6 tens (and 5 ones).
- 60 + 5
- Odd: it ends in 5, so one is left over when you make pairs.
- Composite: 65 has 4 factors.
- Any two of 1 × 65, 5 × 13.
- 75 and 55.
numblocksgen.com/number-blocks-tool/
Teaching tips
- For 7, ask for the bond to 10 before any written work (answer 3).
- For 65, ones make 10 first (5 + 5), then tens make 90 (60 + 30) → 35.
- Bridge back to the Year 2 number bonds lesson for the teaching sequence.