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Cogito

Grade 1 Math · Chapter 7 · Lesson 2

Practice Worksheet

Tens and Ones on a Mat

Show any number to 40 as tens and ones.

10 problems · about 12 minutes · 1.NBT.B.2

NameDate

Figure — use these to answer the problems

Choose a number. Bundle ten ones at a time and watch the columns.

Tens

0

Ones

34

How many34
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Counting Beyond 20”

    What comes right after 20?

    Answer

  2. From “Asking Questions About Data”

    5 apples and 2 stars. How many in all?

    Answer

  3. From “Sorting and Showing Data”

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

    Answer

  4. From “How Much Longer?”

    A 9-cube stick and a 4-cube stick. How much longer is the first?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. How many tens are in 31?

    Answer

  2. 2 tens and 5 ones is which number?

    Answer

  3. How many tens are in 27?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. How many ones are in 27?

    Answer

Stretch Yourself

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

2 problems

  1. 3 tens and 8 ones is which number?

    Answer

  2. Packing Pencils

    Pencils come in boxes of ten. 3 boxes and 2 loose. How many?

    Answerpencils