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Cogito

Grade 7 Math · Chapter 4 · Lesson 1

Practice Worksheet

Adding Signed Numbers

A walk along the line.

10 problems · about 17 minutes · 7.NS.A.1

NameDate

Figure — use these to answer the problems

Set a negative second number and watch the walk go left.
-12-10-8-6-4-2024681012-8-5
-8 + 3 = -5
Start at-8
Add3
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Finding the Original Price”

    £64 after 20% off. Original in pounds?

    Answer

  2. From “Simple Interest”

    £600 at 5% for 2 years. Interest in pounds?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. −9 + 4 = ?

    Answer

  2. What does adding a negative do on the line?

    • Walks left.
    • Walks right.

  3. −5 + 9 = ?

    Answer

  4. 6 + (−10) = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. −3 + (−4) = ?

    Answer

  2. What is the additive inverse of −11?

    Answer

Stretch Yourself

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

2 problems

  1. The Temperature

    It is −7 degrees and rises 12. What is the temperature now?

    Answer

  2. The Account

    An account at −40 pounds receives 15. What is the balance?

    Answer