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Cogito

Grade 2 Math · Chapter 5 · Lesson 7

Practice Worksheet

Adding Up to Four Numbers

Look for pairs that make a friendly number.

10 problems · about 13 minutes · 2.NBT.B.6

NameDate

Figure — use these to answer the problems

Jump each number in turn. The last landing is the total.
020406080100120+ 23+ 17+ 45

0 + 23 + 17 + 45 = 85

Start at0
First number23
Second number17
Third number45
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Subtracting Across a Zero”

    405 − 137 = ?

    Answer

  2. From “Breaking a Hundred Apart”

    635 − 172 = ?

    Answer

  3. From “Subtracting Within 1,000”

    758 − 326 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 13 + 27 + 20 = ?

    Answer

  2. Does the order you add in change the total?

    • No. The total stays the same.
    • Yes. Order matters.

  3. 15 + 25 + 30 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 18 + 22 + 14 + 16 = ?

    Answer

Stretch Yourself

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

3 problems

  1. 11 + 29 + 13 + 27 = ?

    Answer

  2. Four Boxes

    Boxes hold 12, 28, 15 and 25 apples. How many apples in all?

    Answerapples

  3. Three Days

    Leo read 34, 26 and 18 pages on three days. How many pages in all?

    Answerpages