Estimating Place Value
Sum of Decimals
Difference of Decimals
Estimating Equations
Using Models to Solve Equations
100
Round 12.36 to the nearest tenth
12.4
100
Solve.
4.7 + 8.3
13
100
13.4 - 1.7
11.7
100
Estimate the sum.
412 + 565
1,000 or 980
100
Find the perimeter of this shape.
260.068 cm
200
Round 4,324.235 to the nearest hundreds place.
4,300.000 or 4,300
200
Solve.
12.1 + 14.02
26.12
200
5,500.12 - 2.89
5,497.23
200
Estimate the sum to the nearest tenth.
0.44 + 1.74
2.10
(IT IS NOT 2.20)
200
Estimate the perimeter of this rectangle to the nearest tenth.
54.4 inches
300
Round 55,999.34 to the nearest thousands place.
56,000.00 or 56,000
300
Solve.
10.004 + 1.308 + 4
15.312
300
402.17 - 10.82
391.35
300
Estimate the sum to the nearest hundredth.
14.312 + 2.333 + 2.179
18.82
300
Write an equation to show the sum.
1 + 0.13 + 0.20 = 1.33
or
1.13 + 0.20 = 1.33
400
Round 412.1567 to the nearest hundredths place.
412.1600 or 412.16
400
Solve.
40.799 + 500.090 + 1
541.889
400
1,000.400 - 29
971.4
400
Estimate the sum to the nearest whole number.
4.99 + 13.018 + 0.9
19
400
Write an equation that show the difference.
2.56 - 0.33 = 2.23
500
Round 11.689 to the nearest whole number.
12 or 12.000
500
0.129 + 501.73 + 42.003
543.862
500
7,312.59
- 5.306
7,307.284
500
Estimate the sum to the nearest whole number.
10.64 + 102.639 + 0.49
114
500
Write an equation to show the sum.
0.72 + 0.28 + 0.06 = 1.06
or
0.72 + 0.34 = 1.06