脱式计算(能简算的要简算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9×4.8 [113-(34.15+3
脱式计算(能简算的要简算)2.5×7.1×416.12×99+16.125.2×0.9+0.9×4.8[113-(34.15+38.25)]÷23.6÷(1.2+0.6)...
脱式计算(能简算的要简算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9×4.8 [113-(34.15+38.25)]÷2 3.6÷(1.2+0.6)×0.5 4.82÷0.25+1.25÷0.25.
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(1)2.5×7.1×4, =(2.5×4)×7.1, =10×7.1, =71; (2)16.12×99+16.12, =16.12×(99+1), =16.12×100, =1612; (3)5.2×0.9+0.9×4.8, =0.9×(5.2+4.8), =0.9×10, =9; (4)[113-(34.15+38.25)]÷2, =[113-72.4]÷2, =40.6÷2, =20.3; (5)3.6÷(1.2+0.6)×0.5, =3.6÷1.8×0.5, =2×0.5, =1; (6)4.82÷0.25+1.25÷0.25, =4.82×4+1.25×4, =19.28+5, =24.28. |
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