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Decimal Operations Answer Key

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Rounding
#1 Round 4.568 to the hundredths place 4.57
#2 Round 135.678 to the tens place 140
#3 Round 246.7489 to the thousandths place. 246.749
#4 Round 246.7489 to the tenths place 246.7
#5 Round 49.995 to the ones place 50
Adding Decimals
#1 6 + 4.5 10.5
#2 12 + 5.7 17.7
#3 13.4 + 0.82 14.22
#4 24.85 + 36.793 61.643
#5 22.459 + 0.0356 22.4946
Subtracting Decimals
#1 5 - .6 4.4
#2 22.5 - 8 14.5
#3 37.1 - .56 36.54
#4 456.75 - 32.936 423.814
#5 40 - .997 39.003
Multiplying Decimals
#1 5 X 0.8 4
#2 1.2 x 7 8.4
#3 3.2 x 0.9 2.88
#4 4.5 x 0.48 2.16
#5 23.7 x 2.34 55.458
Dividing Decimals
#1 24.8 ÷ 4 6.2
#2 8 ÷ .5 16
#3 2.608 ÷ 0.8 3.26
#4 .552 ÷ 0.12 4.6
#5 7.222 ÷ .23 31.4
Final Question
3.33 x 4.44 14.7852