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(7.5一2.3x0.4)÷0.02脱式计算

2.3+3.91÷(22-19.7) =2.3+3.91÷2.3 =2.3+1.7 =4 1.25×88 =5/4×88 =110 0.8×0.4×0.125×25 =(0.8×0.125)×(0.4×25) =0.1×10 =1 100.7-(75+9.6÷0.4) =100.7-(75+24) =100.7-99 =1.7

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×...

简便运算 1.4x0.27x25 2.560÷16÷5 3.3.8x99+3.8 4.(8+4/9)÷4 5.2/5+3/7+3/5+4/7 6.7/16x9-7/16x7 7.0.4x(12x2.5) 8.(3.8-1.8÷2)x0.5 9.1/4x4÷1/4x4 10.8/13÷7+1/7x5/13 解方程: 1.30x=15 2.50%x-30=52 3.16+4x=40 4.x+0.5x=6 5.3x+1/2=5/3 6.x-...

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你好! 125×7×24 = 125×7×3×8 = (125×8)×(7×3) = 1000×21 = 21000 0.72 + 0.28×1.5÷2.1 = 0.72 + 0.4×0.7×1.5 ÷ (3×0.7) = 0.72 + 0.4×1.5 ÷ 3 = 0.72 + 0.4×0.5 = 0.72 + 0.2 = 0.74 2/3 x + 2/5 x = 4/5 10/15 x + 6/15 x = 4/5 16/15 x = 4/5...

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