如题所述
12.5x0.7x0.8
=12.5×8×0.07
=100×0.07
=7
=12.5×8×0.07
=100×0.07
=7
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第1个回答 2016-07-05
=12.5x0.8x0.7
=10x0.7
=7
=10x0.7
=7
第2个回答 2016-07-05
=（12.5×0.8）×0.7
=10×0.7
=7
=10×0.7
=7
第3个回答 2016-07-05
=12.5×0.8×0.7
=10×0.7
=7
=10×0.7
=7
