计算:(用你喜欢的方法计算下面各题) 2 5 ×0.25+ 1 4 ×3.6 2.5×320×0
计算:(用你喜欢的方法计算下面各题)25×0.25+14×3.62.5×320×0.1257.5-(15+13)×4.575×35+24×60%+35....
计算:(用你喜欢的方法计算下面各题) 2 5 ×0.25+ 1 4 ×3.6 2.5×320×0.125 7.5-( 1 5 + 1 3 )×4.5 75× 3 5 +24×60%+ 3 5 .
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(1)
=
=(
=4×
=1; (2)2.5×320×0.125, =2.5×(4×80)×0.125, =(2.5×4)×(80×0.125), =10×10, =100; (3)7.5-(
=7.5-(
=7.5-(0.9+1.5), =7.5-2.4, =5.1; (4)75×
=75×
=(75+24+1)×
=100×
=60. |
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