(-3又1/8)*(-0.125)-0.125*(-4又7/8)-29又18/19*15 (简便方法计算)
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(-3又1/8)*(-0.125)-0.125*(-4又7/8)-29又18/19*15 (简便方法计算)
(-3又1/8)*(-0.125)-0.125*(-4又7/8)
-29又18/19*15 (简便方法计算)
(-3又1/8)*(-0.125)-0.125*(-4又7/8)-29又18/19*15 (简便方法计算)
(-3又1/8)×(-0.125)-0.125×(-4又7/8)
=25/8×1/8+1/8×39/8
=(25/8+39/8)×1/8
=8×1/8
=1