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Cogito

Grade 1 Math · Chapter 10 · Lesson 3

Practice Worksheet

Numbers to 100

Tens and ones work the same all the way to 100.

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

NameDate

Figure — use these to answer the problems

Build any number to 100. Bundle ten ones at a time.

Tens

0

Ones

67

How many67
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Two-Bar Tape Diagrams”

    Bars of 15 and 8. What is the difference?

    Answer

  2. From “How Many More? How Many Fewer?”

    10 birds and 6 cats. How many more birds?

    Answer

  3. From “Telling Time to the Half Hour”

    How many minutes is half an hour?

    Answer

  4. From “Telling Time to the Hour”

    Short hand on 4, long hand up. What hour?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. How many ones are in 86?

    Answer

  2. 9 tens and 2 ones is which number?

    Answer

  3. How many tens are in 74?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 5 tens and 9 ones is which number?

    Answer

Stretch Yourself

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

2 problems

  1. How many tens are in 100?

    Answer

  2. Boxes of Crayons

    Boxes hold ten crayons. 8 boxes and 4 loose. How many?

    Answercrayons