用你喜欢的方法计算下列各题.(1)3.6+(7.43-3.83)×2.5 (2)100×9.5×0.98+9.5×2(3)54.3×1.8+5
用你喜欢的方法计算下列各题.(1)3.6+(7.43-3.83)×2.5(2)100×9.5×0.98+9.5×2(3)54.3×1.8+54.3×0.3-54.3×0....
用你喜欢的方法计算下列各题.(1)3.6+(7.43-3.83)×2.5 (2)100×9.5×0.98+9.5×2(3)54.3×1.8+54.3×0.3-54.3×0.1(4)〔(2+2.8)÷0.6-1.5〕×0.04.
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(1)3.6+(7.43-3.83)×2.5 =3.6+3.6×2.5, =3.6+9, =12.6; (2)100×9.5×0.98+9.5×2 =9.5×98+9.5×2, =9.5×(98+2), =9.5×100, =950; (3)54.3×1.8+54.3×0.3-54.3×0.1 =54.3×(1.8+0.3-0.1), =54.3×2, =108.6; (4)〔(2+2.8)÷0.6-1.5〕×0.04 =(4.8÷0.6-1.5)×0.04, =(8-1.5)×0.04, =6.5×0.04, =0.26. |
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