五道计算题,求解(尽量简算,(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34====(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)====(3).-0.32×(-4.58)-0.68×(-4.58)====(4).(-125)×(-25)×(-5)×(+2)

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五道计算题,求解(尽量简算,(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34====(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)====(3).-0

五道计算题,求解(尽量简算,(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34====(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)====(3).-0.32×(-4.58)-0.68×(-4.58)====(4).(-125)×(-25)×(-5)×(+2)
五道计算题,求解(尽量简算,
(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34
=
=
=
=
(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)
=
=
=
=
(3).-0.32×(-4.58)-0.68×(-4.58)
=
=
=
=
(4).(-125)×(-25)×(-5)×(+2)×(-4)×(-8)
=
=
=
=
(5).-19又18/19×38(注:是负十九又十九分之十八乘三十八)
=
=
=
=

五道计算题,求解(尽量简算,(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34====(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)====(3).-0.32×(-4.58)-0.68×(-4.58)====(4).(-125)×(-25)×(-5)×(+2)
(1).-13×2/3+0.34×2/7+1/3×(-13)+5/7×0.34
=(-13)×(2/3+1/3)+0.34×(2/7+5/7)
=-13+0.34
=-12-1+0.34
=-12.66
(2).-69又15/16×8(注:是负六十九又十六分之十五乘八)
=-(69×8+15/16×8)
=-(70×8-16/2+15/2)
=-560+1/2
=-559.5
(3).-0.32×(-4.58)-0.68×(-4.58)
=-4.58×(-0.32-0.68)
=-4.58×(-1)
=4.58
(4).(-125)×(-25)×(-5)×(+2)×(-4)×(-8)
=(-125)×(-8)×(-25)×(-4)×(-5)×2
=1000×100×(-10)
=-1000000
(5).-19又18/19×38(注:是负十九又十九分之十八乘三十八)
=-(19×38+18/19×38)
=-(20×38-38+36)
=-760+2
=-758