脱式计算(能简便算的要简便算) (1)89.3×43+38×89.3+893×1.9 (2)10.01×10
脱式计算(能简便算的要简便算)(1)89.3×43+38×89.3+893×1.9(2)10.01×101-10.01(3)4.75×17.5+2.5×4.75(4)1....
脱式计算(能简便算的要简便算) (1)89.3×43+38×89.3+893×1.9 (2)10.01×101-10.01 (3)4.75×17.5+2.5×4.75 (4)1.25×32×0.25 (5)0.22×1.5+1.541÷2.3 (6)(5.15-3.25)×0.4+0.36.
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(1)89.3×43+38×89.3+893×1.9, =89.3×43+38×89.3+89.3×19, =89.3×(43+38+19), =89.3×100, =8930; (2)10.01×101-10.01, =10.01×(101-1), =10.01×100, =1001; (3)4.75×17.5+2.5×4.75, =4.75×(17.5+2.5), =4.75×20, =95; (4)1.25×32×0.25, =1.25×8×4×0.25, =(1.25×8)×(4×0.25), =10×1, =10; (5)0.22×1.5+1.541÷2.3, =0.33+0.67, =1; (6)(5.15-3.25)×0.4+0.36, =1.9×0.4+0.36, =0.76+0.36, =1.12. |
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