A-A+
计算 能简算的写出简算过程.(1)7.5÷25-2.5×52(2)3.5×45+5.5×80
问题详情
计算,能简算的写出简算过程.
(1)7.5÷
(2)3.5×
(3)24×[(1
(4)3.25-2.8×
参考答案
(1)7.5÷25-2.5×52,
=7.5×52-2.5×52,
=(7.5-2.5)×52,
=5×52,
=252;
(2)3.5×45+5.5×80%+0.8,
=3.5×0.8+5.5×0.8+0.8,
=(3.5+5.5+1)×0.8,
=10×0.8,
=8;
(3)24×[(116-23)÷3],
=24×[12÷3],
=24×16,
=4;
(4)3.25-2.8×57+14×47÷0.1,
=3.25-2+17÷0.1,
=3.25-2+107,
=1.25+107,
=21928.
考点:过程