(-3/4)* 3/4 + 9/16 *(-15) (用简便方法计算)

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(-3/4)*3/4+9/16*(-15)(用简便方法计算)(-3/4)*3/4+9/16*(-15)(用简便方法计算)(-3/4)*3/4+9/16*(-15)(用简便方法计算)原式=-9/16+9

(-3/4)* 3/4 + 9/16 *(-15) (用简便方法计算)
(-3/4)* 3/4 + 9/16 *(-15) (用简便方法计算)

(-3/4)* 3/4 + 9/16 *(-15) (用简便方法计算)
原式=-9/16 +9/16 *(-15)
=9/16*(-1)+9/16 *(-15)
=9/16*[(-1)+(-15)]
=9/16*(-16)
=-9