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
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