计算下面各题,能简算的要简算.(1)9.86-3.4÷1.7×1.3 (2)0.36×3.9+3.9×1.64 (3)7.23-(2.8+1.2
计算下面各题,能简算的要简算.(1)9.86-3.4÷1.7×1.3(2)0.36×3.9+3.9×1.64(3)7.23-(2.8+1.23)(4)1.64×2.5+2...
计算下面各题,能简算的要简算.(1)9.86-3.4÷1.7×1.3 (2)0.36×3.9+3.9×1.64 (3)7.23-(2.8+1.23) (4)1.64×2.5+2.1÷0.6 (5)2.4×(0.85÷1.7)-1.08 (6)0.04×[(17.6-14.1)÷1.4].
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(1)9.86-3.4÷1.7×1.3, =9.86-2×1.3, =9.86-2.6, =7.26; (2)0.36×3.9+3.9×1.64,睁察粗 =3.9×(没谨0.36+1.64), =3.9×2, =7.8; (3)悉镇7.23-(2.8+1.23), =7.23-1.23-2.8, =6-2.8, =3.2; (4)1.64×2.5+2.1÷0.6, =4.1+3.5, =7.6; (5)2.4×(0.85÷1.7)-1.08, =2.4×0.5-1.08. =1.2-1.08, =0.12; (6)0.04×[(17.6-14.1)÷1.4], =0.04×(3.5÷1.4), =0.04×2.5, =0.1. |
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