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Vocabulary
Round to the nearest tenths
Estimate the sum or the difference
Round to the nearest whole
Round to the nearest hundredths
100

A digit spot in a number

Place

100

Round 185.23 to the nearest tenths

185.2

100

Estimate 23 - 14

20 - 10 = 10

100

The nearest whole of 87.4

87

100

Round to the nearest hundredths 4.364

4.36

200

How much something is worth, based on its position in a number

Value

200

Round 0.45 to the nearest tenths

0.5

200

Estimate 93+28

90+30=120

200

The nearest whole of 2,506.7

2,507

200

Round 0.546 to the nearest hundredths 

0.55

300

Numbers without fractions and are a collection of positive integers and zero

Whole numbers

300

Round 14.236 to the nearest tenths

14.2

300

Estimate 89 - 67

90 - 70 = 20

300

The nearest whole of 10,587.07

10,587

300

Round 87,780.077 to the nearest hundredths

87,780.08

400

A chart that shows a value and a number based on its digits

Place Value Chart

400

Round 3004.389 to the nearest tenths

3004.4

400

Estimate 99+24

100+20=120

400

The nearest whole of 307,569.71

307,570

400

Round 65,701.306 to the nearest hundredths

65,701.31

500

To make an approximate calculation, often based on rounding

Estimate

500

Round 18,354.5 to the nearest tenths

18,354.5

500

Estimate 418+805

420+810=1230

500

The nearest whole of 504,799.598

504,800

500

Round 2.198 to the nearest hundredths

2.20