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Cogito

Grade 2 Math · Chapter 5 · Lesson 3

Practice Worksheet

Making a New Hundred

When the tens fill up, bundle them.

10 problems · about 13 minutes · 2.NBT.B.7

NameDate

Figure — use these to answer the problems

Count the loose ones and the loose tens before bundling.
First number
and Second number
Altogether

Hundreds

3

Tens

13

Ones

13

268 + 175 = 443

First number268
Second number175
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Adding Within 1,000”

    341 + 236 = ?

    Answer

  2. From “Adding and Subtracting Hundreds”

    400 + 500 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 275 + 168 = ?

    Answer

  2. Ten tens bundle into what?

    • One hundred.
    • One ten.

  3. 350 + 280 = ?

    Answer

  4. 164 + 172 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 247 + 158 = ?

    Answer

  2. 390 + 240 = ?

    Answer

Stretch Yourself

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

2 problems

  1. Two Crowds

    260 people came in the morning and 170 in the afternoon. How many in all?

    Answerpeople

  2. Two Journeys

    A train went 185 km, then 236 km. How far in total?

    Answerkm