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0.25x28

0.25×0.4×0.7=0.1×0.7=0.07

0.75x=280.2 x=280.2/0.75 x=373.6

先算乘除 后算加减 等于10.03

28×0.25 =7×(4×0.25) =7×1 =7

12.5×0.25×2.4×28=(12.5×2.4)×(0.25×28) =(12.5×0.8×3)×(0.25×4×7) =(10×3)×(1×7) =30×7 =210

原式=(95.7+6.3-2)×0.28 =100×0.28 =28

0.25^28次方x0.4^30次方 =0.25^28次方x0.4^28次方x0.4² =(0.25x0.4)^28次方x0.16 =0.1^28次方x16x0.1² =0.1^30次方x16 =16x10^-30次方

2.2×0.25×0.28×2.5 =(2.2÷4)×(0.25×4)×(0.28÷4)×(2.5×4) =0.55×1×0.07×10 =0.55×0.7 =11×0.05×0.7 =11×0.035 =0.385

8•6乘以(1•28-0•28)=8•6乘以1=8•6

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