1/2÷(-1/4) (-3.5)÷7/51/6÷(-5)×(-5/7) -3.5÷7/8×(-3/4)-3×(-4/5)÷(-9/10) 5/6÷(-1又2/3)+2×(-1.5)
问题描述:
1/2÷(-1/4) (-3.5)÷7/5
1/6÷(-5)×(-5/7) -3.5÷7/8×(-3/4)
-3×(-4/5)÷(-9/10) 5/6÷(-1又2/3)+2×(-1.5)
答
原式=1/2×(-4)=-2
原式=-7/2×5/7=-5/2
原式=1/6×(-1/5)×(-5/7)==1/42
原式=-7/2×8/7×(-3/4)=3
原式=-3×(-4/5)×(-10/9)=-2/3
原式=5/6×3/5-3=1/2-3=5/2