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Grade 2 · Math · Unit 5 of 12

Facts to 20

Add and take away

What your child practises

Fluent facts to 20 using strategies like making ten and thinking addition to subtract.

Nova Scotia Curriculum learning outcome: N10 · quick recall of basic addition facts to 18 and related subtraction facts

How we explain it

Children can open this short lesson before they practise.

  1. Use 10 as a stepping stone.
  2. Break one number to make a 10 with the other.
  3. Then add what is left over.

Example: 8 + 5 = ? 8 needs 2 more to make 10. Take 2 from 5. That leaves 3. 10 + 3 = 13. Answer: 13

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    What is 14 − 9?

    14 − 9 = ?

    • 5
    • 0
    • 11

  2. Question 2

    What is 9 − 5?

    9 − 5 = ?

    • 1
    • 4
    • 3

  3. Question 3

    What is 5 + 2?

    • 5
    • 7
    • 8

  4. Question 4

    What number is missing?

    4 + = 16

    • 18
    • 12
    • 10

  5. Question 5

    What is 8 + 9?

    8 + 9 = ?

    • 18
    • 20
    • 17

  6. Question 6

    What is 5 + 4?

    5 + 4 = ?

    • 12
    • 9
    • 11

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