(4+8)×2.5×0.125简便运算?
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(4+8)×2.5×0.125
=4×2.5×0.125+8×2.5×0.125
=4×2.5×0.125+2.5x(8×0.125)
=10x0.125+2.5x1
=1.25+2.5
=3.75
=4×2.5×0.125+8×2.5×0.125
=4×2.5×0.125+2.5x(8×0.125)
=10x0.125+2.5x1
=1.25+2.5
=3.75
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