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Unit 2 Math Review
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What happens to the digits to the right of the underlined digit when you are rounding?
Get rid of them!
What is the most important thing to remember when adding/subtracting decimals?
line up the decimal points!!
What is 327.042 rounded to the nearest hundredth?
327.04
What is 65.899 rounded to the nearest tenth?
65.9
Round to the nearest thousandth: 8.9024
8.902
Estimate the difference (using compatible numbers) : 78.7 - 38.9
40
Estimate the difference (round to the nearest whole number) : 42.9- 12.8
30
Estimate the sum (using compatible numbers) : 62.1 + 28.9
90
Estimate the sum (round to the nearest whole number) : 23.7 + 17.5
32
Find the difference: 21.8 -13.07
8.73
Find the difference: 54.1- 17.9
36.2
Find the sum: 32.9 +6.22
39.12
Find the sum: 3.88 + 7.05
10.93
Find the sum: 7.5 + 12.4
19.9
Round 16.22 to the nearest whole number
16
Round 3.47 to the nearest tenth
3.5