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Round Whole Numbers and Decimals
Estimate Sums and Differences
Add and Subtract Whole Numbers and Decimals
Addition Properties
Random
100
Round to the hundreds place in 4,712.
4,700
100
Estimate 91+14. Show your work.
90+10=100
100
78+11=
89
100
Identify the Addition Property 28+5+62=28+62+5
Commutative Property
100
Use compensation 27+45
72
200
Round 84 to the tens place.
80
200
Estimate 573-429. Show your work.
600-400=200
200
435-120=
315
200
Identify the Addition Property 328+0=328
Identity Property
200
Use compensation 62-13
43
300
Round 326,023 to the thousands place.
326,000
300
Estimate 26.09-5.8. Show your work!
26-6=20
300
6,702-913=
5,789
300
Identify the Addition Property (4+0.7)+0.3=4+(0.7+0.3)
Associative Property
300
Use compensation 482+329
811
400
Round 0.92 to the tenths place.
0.9
400
Estimate 3.95+11.76. Show your work!
4+12=16
400
7.013-2.21=
4.803
400
Use properties of addition to find the sum mentally 46+4+31
Associative Property (46+4)+31 50+31 = 81
400
Use compensation 12.6+7.5
20.1
500
Round 75.235 to the hundredths place.
75.24
500
Valeria had $78.51 in her bank at home. She adds $3.67 in change. About how much does she have now? Show your work!
79+4=$83
500
The male human heart weights an average of 11.1 ounces. This is 1.8 ounces more than the average female's heart. How much does the average female's heart weight?
9.3 oz
500
Use properties of addition to find the sum mentally 8.7+4+0.3
Commutative Property then Associate Property (8.7+0.3)+4 9+4 = 13
500
Use compensation 4.92-3.74
1.18