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Cogito

Grade 6 Math · Chapter 3 · Lesson 5

Practice Worksheet

Adding and Subtracting Decimals

Line up the point, not the digits.

10 problems · about 17 minutes · 6.NS.B.3

NameDate

Figure — use these to answer the problems

Shade two amounts and see how tenths and hundredths combine.

30/100 = 0.30 = 0.3

5/100 = 0.05

0.00.10.20.30.40.50.60.70.80.91.0
First value in hundredths30
Second value in hundredths5
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Dividing Multi-Digit Numbers”

    468 ÷ 18 = ?

    Answer

  2. From “Common Factors and Common Multiples”

    Greatest common factor of 16 and 40?

    Answer

  3. From “Multiplying and Dividing Decimals”

    9 ÷ 0.3 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 6.4 + 2.75 = ?

    Answer

  2. 2.4 + 1.35 = ?

    Answer

  3. 5.6 − 2.45 = ?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 0.3 + 0.05 = ?

    Answer

  2. 7 − 3.25 = ?

    Answer

Stretch Yourself

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

2 problems

  1. The Shopping

    £3.45 and £2.30 together, in pounds?

    Answer

  2. The Change

    £10 minus £6.40, in pounds?

    Answer