New
New
Year 1

Use number pairs to 10 in subtraction contexts

I can use number pairs to ten to solve subtraction problems and equations.

New
New
Year 1

Use number pairs to 10 in subtraction contexts

I can use number pairs to ten to solve subtraction problems and equations.

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Lesson details

Key learning points

  1. Our knowledge of pairs that sum can help when solving subtraction problems and equations.
  2. Quickly remembering these number pairs is important for later work.

Common misconception

Children may try to count back from 10 rather than using knowledge of pairs that sum to 10.

Use practical equipment to make links between addition and subtraction explicit, demonstrating the relationship on cherry or bar models and number lines.

Keywords

  • Subtract - To separate or take one number away from another.

  • Difference - The result of subtracting one number from another.

  • Minuend - The first number in a subtraction; the number from which another number (the subtrahend) is to be subtracted.

  • Subtrahend - The number that is to be subtracted; the second number in a subtraction.

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
Sam places 5 counters on the tens frame and uses it to complete the equation. 10 = 5+___ What is the missing addend in the equation?
An image in a quiz
6
4
Correct answer: 5
Q2.
There are 10 beads on the bead string, but some are hidden. How many are hidden?
An image in a quiz
Correct answer: 7
10
3
Q3.
Sam says 4 + 5 definitely cannot sum to 10. How does she know?
Ten cannot be partitioned into two odd numbers.
Correct answer: Ten cannot be partitioned in one odd and one even number.
Ten cannot be partitioned in two even numbers.
Q4.
Jacob buys two toys in the toy shop and spends 10 pounds. One of his toys cost 1 pound. what was the price of the other toy?
8
10
Correct answer: 9
Q5.
Match the expressions to the correct statement.
Correct Answer:4 + 6,Sum to 10

Sum to 10

Correct Answer:4 + 5,Do not sum to 10

Do not sum to 10

Correct Answer:5 + 5,Sum to 10

Sum to 10

Correct Answer:5 + 6,Do not sum to 10

Do not sum to 10

Q6.
Match the expressions to show if they sum to 10, greater than 10 or less than 10
Correct Answer:3 + 7,Sum to 10

Sum to 10

Correct Answer:3 + 8,Greater than 10

Greater than 10

Correct Answer:3 + 6,Less than 10

Less than 10

6 Questions

Q1.
Sam collected 10 conkers. She put 7 in her bag and the rest in her pocket. Which part part whole model matches the problem?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
Q2.
Which number fact to 10 will help to find the missing part in this part part whole model?
An image in a quiz
10 = 3 + 7
Correct answer: 10 = 6 + 4
10 = 8 + 2
Q3.
What is the missing number on the number line?
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3
4
Correct answer: 5
6
Q4.
How big is this jump on the number line?
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10
Correct answer: 7
3
0
Q5.
Match the missing number to the equation.
Correct Answer:7 + ___ = 10,3

3

Correct Answer:6 + ___ = 10,4

4

Correct Answer:10 = ___ + 5,5

5

Correct Answer:10 = ___ + 8,2

2

Q6.
Match the missing number to the equation.
Correct Answer:10 - ___ = 3,7

7

Correct Answer:10 - ___ = 6,4

4

Correct Answer:2 = 10 - ___,8

8

Correct Answer:9 = 10 - ___,1

1