Estimating Decimals - Sums & Differences - NICHOLAS GLAESER | Library

4

When estimating decimals, round each decimal first then add or subtract.

A paperclip has a mass of 4.237 grams.  A pencil has a mass of 35.82 grams.  About how many more grams is the pencil than the paperclip to the nearest tenth of a gram?

__________ __________ __________ = __________

6

Sophie went to the grocery store and placed three items in her cart:

   - A pack of paper plates for $4.73
   - A 2-liter bottle of Cola for $3.35
   - A pack of Styrofoam cups for $1.99

To the nearest dollar, about how much money do the three items in Sophie’s cart cost altogether?

__________ __________ __________ __________ __________ = __________

4

What is the difference of 0.946 and 0.574 rounded to the nearest tenth?

__________ __________ __________ = __________

4

What is the sum of 8.647 and 3.384 rounded to the nearest hundredth?

__________ __________ __________ = __________

3

Estimate the sum or difference to the nearest tenth.

16.72 + 5.37 → __________ + __________ = __________

3

Estimate the sum or difference to the nearest tenth.

8.26 – 3.76 → __________ – __________ = __________

3

Estimate the sum or difference to the nearest tenth.

5.647 + 7.26 → _______ + _______  = _______ 

3

Estimate the sum or difference to the nearest tenth.

8.49 – 3.72 → _______ – _______  = _______ 

3

Estimate the sum or difference to the nearest hundredth.

2.738 + 1.973 → __________ + __________ = __________

3

Estimate the sum or difference to the nearest hundredth.

1.386 – 0.943 → __________ – __________ = __________

3

Estimate the sum or difference to the nearest hundredth.

1.684 + 2.738 → _______ + _______  = _______ 

3

Estimate the sum or difference to the nearest hundredth.

4.238 – 1.972 → _______ – _______  = _______ 

1

Estimate the sum of 0.897 and 4.432 to the nearest tenth.

1

Estimate the difference of 7.455 and 2.324 to the nearest hundredth.

1

Estimate the sum of $3.48 and $6.25 to the nearest tenth (10 cents).

1

Approximation the difference between $8.62 and $3.99 to the nearest dollar?

3

Match each estimated sum or difference to the matching estimation to the tenths place.

6.72 + 2.67
4.72 + 4.88
14.65 – 5.18

9.6
9.5
9.4

3

Match each estimated sum or difference to the matching estimation to the hundredths place.

6.943 – 1.486
12.846 – 7.374
1.682 + 3.778

5.46
5.48
5.45