1.-3/4×(8-1又1/3-14/15)2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)3.9又18/19×19
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![1.-3/4×(8-1又1/3-14/15)2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)3.9又18/19×19](/uploads/image/z/3014779-67-9.jpg?t=1.-3%2F4%C3%97%288-1%E5%8F%881%2F3-14%2F15%292.%28-5%29%C3%973%2F13%2B%28-5%29%C3%97%28-2%2F13%29-5%C3%971%2F13%C3%97%28-14%2F13%29%C3%97%28-8%293.9%E5%8F%8818%2F19%C3%9719)
1.-3/4×(8-1又1/3-14/15)2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)3.9又18/19×19
1.-3/4×(8-1又1/3-14/15)
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
3.9又18/19×19
1.-3/4×(8-1又1/3-14/15)2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)3.9又18/19×19
1.-3/4x(8-1又1/3-14/15)
=-3/4X8-(-3/4X4/3)-(-3/4X14/15)
=-2/3+1+7/10
=31/30
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
=(-5X3+5X2-5X1+14X8)/13
=102/13
3.9又18/19×19
=(9x19+18)/19x19
=189
1.-5+7/10
2.-32/13
3.162