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Cogito

Grade 1 Math · Chapter 8 · Lesson 2

Practice Worksheet

Subtracting Tens From Tens

Take whole tens away and count what is left.

10 problems · about 10 minutes · 1.NBT.C.6

NameDate

Figure — use these to answer the problems

The faded rods are the ones being taken away.
Start with
Taken away
What is left

Tens

3

Ones

0

40 − 10 = 30

Start with40
Take away10
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Adding Tens to Tens”

    20 + 10 = ?

    Answer

  2. From “One More, One Less, Ten More, Ten Less”

    Ten less than 34 is?

    Answer

  3. From “Ten More, Ten Less”

    What is ten more than 21?

    Answer

  4. From “Greater Than, Less Than, Equal To”

    What does < mean?

    • Is less than.
    • Is greater than.

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 30 − 20 = ?

    Answer

  2. 40 − 40 = ?

    Answer

  3. 20 − 10 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 40 − 30 = ?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. 20 − 20 = ?

    Answer

  2. Sharing Stickers

    Ana has 30 stickers. She gives away 10. How many are left?

    Answerstickers