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Cogito

Grade 1 Math · Chapter 10 · Lesson 7

Practice Worksheet

Adding to 100 With Place Value

Add bigger numbers by adding tens to tens.

10 problems · about 13 minutes · 1.NBT.C.4

NameDate

Figure — use these to answer the problems

Count the rods from both rows, then the cubes.
First number
and Second number
Altogether

Tens

7

Ones

7

42 + 35 = 77

First number42
Second number35
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Ten More, Ten Less to 100”

    Ten more than 66 is?

    Answer

  2. From “Comparing Numbers to 100”

    Which is greater, 38 or 41?

    Answer

  3. From “Counting to 120”

    What comes right after 104?

    Answer

  4. From “Numbers to 100”

    How many ones are in 86?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 34 + 25 = ?

    Answer

  2. 61 + 27 = ?

    Answer

  3. 23 + 41 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 52 + 36 = ?

    Answer

Stretch Yourself

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

2 problems

  1. 45 + 30 = ?

    Answer

  2. Two Collections

    Leo has 31 cards. Ana has 24. How many altogether?

    Answercards