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Estimating with Whole Numbers
Estimating with Decimals
Using compatible numbers to multiply.
Using compatible numbers to divide.
Mixed Review
100
28 X 36
What is 30 X 40 = 1,200
100
8.31 + 3.96
What is 8 + 4 = 12
100
28.22 X 4.56 =
What is 30 X 5 = 150
100
237.5 / 6
What is 240 / 6 = 40
100
When you see a single digit number you should __________.
leave it ALONE.
200
598 X 56
What is 600 X 60 = 36,000
200
23.84 - 7.91
What is 24 - 8 = 16
200
56.3 X 1.65
What is 55 X 2 = 110 OR 60 X 2 = 120
200
712.29 / 9 =
What is 720 / 9 = 80
200
10.134 + 0.21
What is 10 + 0 = 10
300
921 - 814 =
What is 920 - 810 = 110 OR 900 - 800= 100
300
15.52 + 3.49
What is 16 + 3 = 19
300
96.4 X 2.47 =
What is 100 X 2 = 200
300
12.398 / 4.1 =
What is 12 / 4 = 3
300
347 -72 =
What is 350 - 70 = 280
400
23 + 71 + 38
What is 20 + 70 + 40 = 130
400
84.37 - 79.66
What is 84 - 80 = 4
400
28 X 21
What is 30 X 20 = 600
400
56.784 / 7.9 =
What is 56 / 8 = 7
400
279.31 / 41
What is 280 / 40 = 7
500
528 X 603
What is 500 X 600 = 300,000
500
39.51 + 26.97 + 59.94
What is 40 + 27 + 60= 127
500
4 X 5,992 =
What is 4 X 6,000 = 24,000
500
481.4 / 64
What is 480 / 60 = 8
500
52.74 - 13.4 - 2.107
What is 53 - 13 - 2 = 38