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Grade 1 · Math · Unit 4 of 8

Take Away

How many are left?

What your child practises

Subtracting within 20 by counting back and thinking addition, and solving short take-away and compare stories.

Nova Scotia Curriculum learning outcome: N09, N10 · subtraction facts to 20 as the opposite of addition

How we explain it

Children can open this short lesson before they practise.

  1. Taking away means some go away.
  2. Start with the whole group.
  3. Count back the number you take away.

Example: 9 − 4 = ? Start at 9. Count back 4: 8, 7, 6, 5. Answer: 5

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

    3 + 7 = 10. So what is 10 − 7?

    10 − 7 = ?

    • 0
    • 3
    • 8

  2. Question 2

    Start at 8. Hop back 2. Where do you land?

    039121518?
    • 6
    • 0
    • 11

  3. Question 3

    There are 19 🐞 on a leaf. 4 crawl away. How many are left?

    🐞19 − 4
    • 17
    • 15
    • 16

  4. Question 4

    Lena had 8 🍓 and ate 6. How many are left?

    🍓🍓❌❌❌❌❌❌
    • 0
    • 5
    • 2

  5. Question 5

    What is 20 − 3?

    20 − 3 = ?

    • 17
    • 14
    • 18

  6. Question 6

    There are 17 🐦 in a tree. 8 fly away. How many are left?

    🐦17 − 8
    • 4
    • 9
    • 6

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