如题所述
-7除以3-14除以3
=-(7+14)÷3
=-21÷3
=-7
(-3.5)/7/8*(-3/4)
=3.5*8/7*3/4
=4*3/4
=3
【(+1又3/4)-(-7/8)+(-7/12)】除以(-7/8)
=(7/4+7/8-7/12)×(-8/7)
=-7/4×8/7-7/8×8/7+7/12×8/7
=-2-1+2/3
=-2又1/3
=-(7+14)÷3
=-21÷3
=-7
(-3.5)/7/8*(-3/4)
=3.5*8/7*3/4
=4*3/4
=3
【(+1又3/4)-(-7/8)+(-7/12)】除以(-7/8)
=(7/4+7/8-7/12)×(-8/7)
=-7/4×8/7-7/8×8/7+7/12×8/7
=-2-1+2/3
=-2又1/3
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第1个回答 2020-08-12
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