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Cogito

Grade 3 Math · Chapter 2 · Lesson 5

Practice Worksheet

Subtracting Within 1,000 Fluently

Break a unit open when you need to.

10 problems · about 14 minutes · 3.NBT.A.2

NameDate

Figure — use these to answer the problems

Break a hundred or a ten open when a column runs short.
Start with
Taken away
What is left

Hundreds

3

Tens

5

Ones

5

502 − 147 = 355

Start with502
Take away147
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Adding Within 1,000 Fluently”

    385 + 247 = ?

    Answer

  2. From “Estimating Sums and Differences”

    Estimate 406 + 195 to the nearest hundred.

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 905 − 348 = ?

    Answer

  2. How do you check a subtraction?

    • Add the answer to what was taken away.
    • Subtract a second time.

  3. 624 − 358 = ?

    Answer

  4. 700 − 265 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 486 − 253 = ?

    Answer

  2. Check it: 233 + 253 = ?

    Answer

Stretch Yourself

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

2 problems

  1. The Collection

    A collection of 613 stamps loses 248. How many are left?

    Answerstamps

  2. The Target

    A target of 800 has 342 done. How many are left?

    Answerleft