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Cogito

Grade 4 Math · Chapter 6 · Lesson 5

Practice Worksheet

Adding Tenths and Hundredths

Change the tenths into hundredths, then count.

10 problems · about 15 minutes · 4.NF.C.5

NameDate

Figure — use these to answer the problems

Set one to whole columns and the other to loose squares. Both are hundredths.

30/100 = 0.30 = 0.3

25/100 = 0.25

0.00.10.20.30.40.50.60.70.80.91.0
Tenths, as hundredths30
Hundredths25
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Comparing Decimals”

    Which is bigger, 0.9 or 0.89?

    • 0.9.
    • 0.89.

  2. From “Why 0.7 and 0.70 Are Equal”

    0.2 in hundredths. How many?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 7/10 + 15/100. How many hundredths?

    Answer

  2. 4/10 written in hundredths. How many?

    Answer

  3. 3/10 + 12/100. How many hundredths?

    Answer

  4. 6/10 + 5/100. How many hundredths?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 1/10 + 45/100. How many hundredths?

    Answer

  2. Why must the tenths be rewritten first?

    • The units have to match before counting.
    • It looks neater.

Stretch Yourself

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

2 problems

  1. The Ribbon

    2/10 metre plus 35/100 metre. How many hundredths in all?

    Answerhundredths

  2. The Bottle

    5/10 litre plus 12/100 litre. How many hundredths in all?

    Answerhundredths