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Worksheet: Subtraction of 7, 8, or 9 from Teen Numbers

In this worksheet, we will practice subtracting 7, 8, or 9 from numbers between 11 and 20 by first subtracting from ten and then considering the ones.

Q1:

Which addition expression is equal to ?

  • A
  • B
  • C
  • D
  • E

Q2:

Think about taking away 9 from different numbers.

For example, the pictures show that 10 take away 9 is 1 and 11 take away 9 is 1 + 1 .

Look at these number sentences. Which one is WRONG?

  • A 1 5 − 9 = 1 + 5
  • B 1 7 − 9 = 1 + 7
  • C 1 9 − 9 = 1 + 1 0

Q3:

Let us try to find 13 take away 9.

We can draw 13 dots as one group of 10 dots and one group of 3 dots.

Now take away 9 from the group of ten dots.

We are left with 1 + 3 dots which is 4 dots.

So 1 3 – 9 = 4 .

Now you have a go. What is 1 2 – 9 ?

Q4:

Sherif is baking cupcakes. He has 10 cupcakes cooling on the table, and 7 cupcakes in the oven. He puts icing on 9 of the cupcakes on the table. If all the cupcakes need to be iced by the end of the day, how many more cupcakes does he need to ice?

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