递等式计算(能简便的要用简便方法计算).①(1÷0.5+0.5÷1)×3.2②0.25×3.7×(3.8+0.2)③52.8÷[1
递等式计算(能简便的要用简便方法计算).①(1÷0.5+0.5÷1)×3.2②0.25×3.7×(3.8+0.2)③52.8÷[18.2-(4.24÷0.8-0.3)]④...
递等式计算(能简便的要用简便方法计算).①(1÷0.5+0.5÷1)×3.2②0.25×3.7×(3.8+0.2)③52.8÷[18.2-(4.24÷0.8-0.3)]④0.375×8-0.8+7.25×0.8.
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(1)(1÷0.5+0.5÷1)×3.2, =(2+0.5)×3.2, =2.5×4×0.8, =10×0.8, =8; (2)0.25×3.7×(3.8+0.2), =0.25×4×3.7, =1×3.7, =3.7; (3)52.8÷[18.2-(4.24÷0.8-0.3)], =52.8÷[18.2-(5.3-0.3)], =52.8÷[18.2-5], =52.8÷13.2, =4; (4)0.375×8-0.8+7.25×0.8, =0.8×(3.75-1+7.25), =0.8×10, =8. |
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