A-A+
计算 能简算的要写出简算过程. 24×(138-312)45×38+56×37.5%-0.3
问题详情
计算,能简算的要写出简算过程.
参考答案
①24×(138-312),
=24×138-24×312,=39-6,
=33.②45×38+56×37.5%-0.375,
=45×0.375+56×0.375-0.375,
=0.375×(45+56-1),
=0.375×100,
=37.5;
③[1-(14+38)]÷34,
=[1-58]÷34,
=38×43,
=12;
④1319-313+2519-1013,
=1319+2519-313-1013,
=1319+2519-(313+1013),
=2-1,
=1;⑤38×8÷35×5,
=38×8×53×5,
=25;
⑥1318×(918×17+918),
=1318×[918×(17+1)],
=1318×[918×18],
=1318×9,
=132.
考点:过程