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25x33x4用简便方法怎样脱式计算?

25x33x4 =25x4x33 =100x33 =3300

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×...

用脱式计算下面各题。 1、125+25×6 2、(135+75)÷(14×5) 3、120-60÷5×5 4、1024÷16×3 5、(135+415)÷5+16 6、1200-20×720-720÷15 7、(360-144)÷24×3 8、240+480÷30×(6+13) 9、(120×2+120)÷9 10、164-13×5+85 11、330÷(65-50) 12、...

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...

35.4-4x=12.2 解:4x=35.4-12.2 4x=23.2 x=23.2÷4 x=5.8

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