40.8X1.6减165.9脱式计算怎么做_数学解答

40.8X1.6减165.9脱式计算怎么做

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解答

40.8X1.6-165.9
=65.28-165.9
=-100.623.52乘0.25加26.73.52×0.25+26.7

=0.88+26.7
=27.583.5乘1.4乘0.33.5×1.4×0.3

=4.9×0.3
=1.47