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Cogito

Grade 2 Math · Chapter 4 · Lesson 2

Practice Worksheet

Making a New Ten

When the ones fill up, bundle them.

10 problems · about 13 minutes · 2.NBT.B.5, 2.NBT.B.9

NameDate

Figure — use these to answer the problems

Count the loose ones. If there are ten or more, bundle them.
First number
and Second number
Altogether

Tens

5

Ones

13

38 + 25 = 63

First number38
Second number25
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Adding With Place Value”

    23 + 41 = ?

    Answer

  2. From “A Hundred More, A Hundred Less”

    A hundred more than 546 is?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 29 + 34 = ?

    Answer

  2. When you bundle ten ones, what do you get?

    • One ten.
    • One one.

  3. 46 + 27 = ?

    Answer

  4. 35 + 28 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 42 + 31 = ?

    Answer

  2. 59 + 26 = ?

    Answer

Stretch Yourself

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

2 problems

  1. Two Shelves

    One shelf holds 27 books and another holds 46. How many books in all?

    Answerbooks

  2. Collecting

    Ana has 55 shells and finds 29 more. How many does she have now?

    Answershells