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Cogito

Grade 1 Math · Chapter 7 · Lesson 3

Practice Worksheet

Multiples of Ten

See that 10, 20, 30, and 40 have no ones at all.

10 problems · about 9 minutes · 1.NBT.B.2.c

NameDate

Figure — use these to answer the problems

Step through 10, 20, 30, and 40. Watch the ones column.

Tens

2

Ones

0

How many20
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Tens and Ones on a Mat”

    How many tens are in 31?

    Answer

  2. From “Counting Beyond 20”

    What comes right after 20?

    Answer

  3. From “Asking Questions About Data”

    5 apples and 2 stars. How many in all?

    Answer

  4. From “Sorting and Showing Data”

    A graph shows 4 apples and 6 stars. How many in all?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. Three tens is which number?

    Answer

  2. What does the 0 in 20 mean?

    • There are no ones.
    • There is nothing at all.

  3. How many tens are in 40?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. Two tens is which number?

    Answer

Stretch Yourself

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

2 problems

  1. How many ones are in 30?

    Answer

  2. Egg Boxes

    Each box holds ten eggs. Leo has 3 full boxes. How many eggs?

    Answereggs