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32x2.5x1.25脱式计算

32x2.5x1.25脱式计算 =8x4x2.5x1.25 =(8x1.25)x(4x2.5) =10x10 =100

=278×(67+32+1) =278×100 =27800

=300-1-32x(20-1) =300-32x20+32x1+1 =300-640+33 =33-340 =-307

234/(3X3)=234/9=26

32X18一28x11 =576-308 =268

原式=32x2+32x12 =32x(2+12) =32x14 =(30+2)x14 =30x14+2x14 =420+28 =448

480+32x|4-280的脱式计算 480+32x|4-280 =480-280+448 =200+448 =648

12.48÷(32×8分之3+3.6) =12.48÷(12+3.6) =12.48÷15.6 =0.8 不能简便计算。

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