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Cogito

Grade 2 Math · Chapter 3 · Lesson 9

Practice Worksheet

Ten More, Ten Less

Add or take a ten without counting.

10 problems · about 12 minutes · 2.NBT.B.8

NameDate

Figure — use these to answer the problems

Step the number by ten and watch which column changes.

Hundreds

3

Tens

4

Ones

2

The number342
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Using Greater Than and Less Than”

    Which symbol makes this true: 415 ? 451

    • <
    • >
    • =

  2. From “Comparing Three-Digit Numbers”

    Which is greater, 548 or 584?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. Ten more than 236 is?

    Answer

  2. Ten more than 390 is?

    Answer

  3. Ten more than 315 is?

    Answer

  4. Ten less than 682 is?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Ten more than 495 is?

    Answer

  2. Ten less than 703 is?

    Answer

Stretch Yourself

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

2 problems

  1. The Collection

    Leo has 428 stamps and buys 10 more. How many now?

    Answerstamps

  2. Giving Some Away

    Ana has 561 beads and gives away 10. How many are left?

    Answerbeads