Skip to lesson

Choose “Save as PDF” in the print dialog to keep a copy.

Cogito

Grade 1 Math · Chapter 5 · Lesson 5

Practice Worksheet

Counting On or Making Ten?

Two good ways. Which is quicker here?

10 problems · about 12 minutes · 1.OA.C.6

NameDate

Figure — use these to answer the problems

Try a small second number, then a big one. Which felt easier?
First ten
The rest
First number9
Second number2
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Start With the Bigger One”

    6 + 9 = ?

    Answer

  2. From “Making Ten From Eight”

    8 + 5 = ?

    Answer

  3. From “Making Ten From Nine”

    9 + 5 = ?

    Answer

  4. From “Adding Three Numbers”

    3 + 7 + 5 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 8 + 2 = ?

    Answer

  2. 9 + 6 = ?

    Answer

  3. 9 + 1 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. 8 + 7 = ?

    Answer

Stretch Yourself

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

2 problems

  1. 9 + 3 = ?

    Answer

  2. Choosing a Way

    Which would you rather do for 9 + 8?

    • Make a ten.
    • Count on eight hops.