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(7.5一2.3x0.4)÷0.02脱式计算

原式=(7.5-0.92)÷0.02 =6.58÷0.02 =329

3.96+0.4=4 3.2*0.5=1.6 4+1.6=5.6

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×...

2.5*4*2.2=22

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

6x-0.4×6 = 9.6 118-2×( 4.1 + X ) = 55 4x +80 = 160 9.6÷X = 0.8 4.8-X = 3×( X + 6 ) 4.3X-1.5 + 3.2X = 4.5 2.7X-1.6 = 38.9 X÷4.5 = 20 (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....

解:(0.125×0.8)×(0.25×0.4)=0.1×0.1=0.01

27.9+13.3×4.2-36.7 =27.9+55.86-36.7 =47.06

3.8-0.8×1.5-0.5 =3.8-(0.8×1.5+0.5) =3.8-(0.8×3×0.5+0.5) =3.8-0.5×(2.4+1) =0.4+3.4-0.5×3.4 =0.4+3.4×(1-0.5) =0.4+3.4×0.5 =0.4+1.7 =2.1

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