322.5+13.29-18.04简便运算
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322.5+13.29-18.04简便运算
3题
(1)332.5+13.29-18.04
=332.5+13-18+0.29-0.04
=332.5-5+0.25
=327.5+0.25
=327.75
(2)24.5+(3.74-0.98)
=24.5+3.76-0.02-0.98
=24.5+3.76-1
=23.5+3.76
=27.26
(3)原式
=6.38+3.62+7.56
=10+7.56
=17.56
(4)原式
=59.2-(1.43+8.57)
=59.2-10
=49.2
3题
(1)332.5+13.29-18.04
=332.5+13-18+0.29-0.04
=332.5-5+0.25
=327.5+0.25
=327.75
(2)24.5+(3.74-0.98)
=24.5+3.76-0.02-0.98
=24.5+3.76-1
=23.5+3.76
=27.26
(3)原式
=6.38+3.62+7.56
=10+7.56
=17.56
(4)原式
=59.2-(1.43+8.57)
=59.2-10
=49.2
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