问题标题:
【数学题四则混合运算题40道和简易方程20道带答案!】
问题描述:

数学题四则混合运算题40道和简易方程20道带答案!

耿仁涛回答:
  1.3/7×49/9-4/3   2.8/9×15/36+1/27   3.12×5/6–2/9×3   4.8×5/4+1/4   5.6÷3/8–3/8÷6   6.4/7×5/9+3/7×5/9   7.5/2-(3/2+4/5)   8.7/8+(1/8+1/9)   9.9×5/6+5/6   10.3/4×8/9-1/3   11.7×5/49+3/14   12.6×(1/2+2/3)   13.8×4/5+8×11/5   14.31×5/6–5/6   15.9/7-(2/7–10/21)   16.5/9×18–14×2/7   17.4/5×25/16+2/3×3/4   18.14×8/7–5/6×12/15   19.17/32–3/4×9/24   20.3×2/9+1/3   21.5/7×3/25+3/7   22.3/14××2/3+1/6   23.1/5×2/3+5/6   24.9/22+1/11÷1/2   25.5/3×11/5+4/3   26.45×2/3+1/3×15   27.7/19+12/19×5/6   28.1/4+3/4÷2/3   29.8/7×21/16+1/2   30.101×1/5–1/5×21   31.50+160÷40(58+370)÷(64-45)   32.120-144÷18+35   33.347+45×2-4160÷52   34.(58+37)÷(64-9×5)   35.95÷(64-45)   36.178-145÷5×6+42   37.812-700÷(9+31×11)   38.85+14×(14+208÷26)   39.(284+16)×(512-8208÷18)   40.120-36×4÷18+35   X-2/7X=3/4   70%X+20%X=3.6   25%+10X=4/5   X-15%X=68   X+3/8X=121   5X-3×5/21=5/11   6X+5=13.4   X÷(6/35)=(26/45)×(13/25)   2(x-0.6)=4   (0.5+x)+x=9.8÷2   2(X+X+0.5)=9.8   25000+x=6x   3200=450+5X+X   X-0.8X=6   12x-8x=4.8   7.5*2X=15   1.2x=81.6   x+5.6=9.4   52-x=15   91÷x=1.3
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