dudu5585
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共回答了18个问题采纳率:77.8% 举报
①(-13又3分之1)÷(-5)+(-6又3分之2)÷(-5)
=-(40/3)÷(-5)+(-20/3)÷(-5)
=(40/3)÷5+(20/3)÷5
=8/3+4/3
=12/3
=4
②-2^3-3×(-1)^3-(-1)^4
=-8-3×(-1)-1
=-8+3-1
=-5-1
=-6
③-2×(0.1)^3×(-0.2)^2+(-0.8)
=-2×0.001×0.04-0.8
=-0.00008-0.8
=-0.80008
1年前
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