初一数学问题,请学霸解答!!要步骤和过程
1。(-30)×(1/3-5/6-3/10) =(-30)×1/3 30×5/6 30×3/10 =-10 25 9=24 2,-1?-(2。5-2)×1/4×[4-(-1)3】 =-1-1/2×1/4×[4-(-1)] =-1-1/8×(4 1)=-1-5/8=-13/8=-1又5/8 3,25×3/4-(-25)×1/2 25×(-1/4) =75/4 25/2-25/4 =(75/4-25/4) 25/2 =50/4 50/4=100/4=25 4,(-2又1/5)×|1/3-1/2|×3/11÷(-1又1/4) =-11/5×1/6×3/11÷(-5/4) =-1/10×(-4/5...全部
1。(-30)×(1/3-5/6-3/10) =(-30)×1/3 30×5/6 30×3/10 =-10 25 9=24 2,-1?-(2。5-2)×1/4×[4-(-1)3】 =-1-1/2×1/4×[4-(-1)] =-1-1/8×(4 1)=-1-5/8=-13/8=-1又5/8 3,25×3/4-(-25)×1/2 25×(-1/4) =75/4 25/2-25/4 =(75/4-25/4) 25/2 =50/4 50/4=100/4=25 4,(-2又1/5)×|1/3-1/2|×3/11÷(-1又1/4) =-11/5×1/6×3/11÷(-5/4) =-1/10×(-4/5)=2/25 5,-23÷4/9×(-2/3)2 =-8×9/4×4/9=8 6,-13×2/3-0。
34×2/7 (-13)×1/2-5/7×0。34 =(-13×2/3-13×1/2)-(0。34×2/7-5/7×0。34) =-13×(2/3 1/2)-0。34×(2/7 5/7) =-13×7/6-0。
34×1 =-91/6-17/50=-2326/150=-1163/75。收起