Word Form
Round to placevalue
Rounding estimation
Clustering estimation
Front-end estimation
100
2.3
What is two and three tenths.
100
3.21, tenths
What is 3.2
100
2.32 + 2.52
What is 5
100
4.79 + 5.29 + 4.99
What is 15
100
51.62 + 6.58 ______
What is 57
200
0.68
What is sixty-eight hundreths.
200
6.5892, hundredths
What is 6.59
200
18.93 + 27.45
What is 50
200
8.2 + 7.8 + 7.5 + 7.99
What is 32
200
4.57360 + 0.58256
What is 4
300
twenty and two hundredths
What is 20.02
300
0.0914, thousandths
What is 0.091
300
13.23 - 2.87
What is 10
300
59.62 + 60.4 + 60 + 61
What is 240
300
233.10-23.62
What is 210
400
99.207
What is ninety-nine and two hundred seven thousandths.
400
131.1555; thousandths
What is 131.156
400
87.146 - 24.953
What is 70
400
15.044 + 14.765 + 14.689
What is 45
400
820.1 + 3.2
What is 823
500
One hundred twenty-eight and seven hundred thirty-two ten thousandths.
What is 128.0732
500
232.98; tenths
What is 233.0
500
46.83 + 18.60
What is 70
500
89.04 + 87.55 + 90.101 + 91
What is 360
500
102.34 + 23.00 + 32.67
What is 157
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