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Cogito

Grade 1 Math · Chapter 5 · Lesson 4

Practice Worksheet

Start With the Bigger One

Swap first, then make your ten.

10 problems · about 12 minutes · 1.OA.B.3, 1.OA.C.6

NameDate

Figure — use these to answer the problems

Put the bigger number first. See how much less there is to move.
First ten
The rest
First number9
Second number6
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Making Ten From Eight”

    8 + 5 = ?

    Answer

  2. From “Making Ten From Nine”

    9 + 5 = ?

    Answer

  3. From “Adding Three Numbers”

    3 + 7 + 5 = ?

    Answer

  4. From “Counting to Twenty and Back”

    What comes after 18?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 6 + 9 = ?

    Answer

  2. 2 + 9 = ?

    Answer

  3. 3 + 9 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 5 + 8 = ?

    Answer

Stretch Yourself

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

2 problems

  1. 4 + 7 = ?

    Answer

  2. The Playground

    There are 5 children on the slide and 8 on the swings. How many children in all?

    Answerchildren