计算下面各题.(能简便计算的要简便计算)4.2×(6.18-3.03)+6.315.02-6.8-(1.02+1.2)0.6×[(5-0.68
计算下面各题.(能简便计算的要简便计算)4.2×(6.18-3.03)+6.315.02-6.8-(1.02+1.2)0.6×[(5-0.68)÷1.2]2.7÷4+6....
计算下面各题.(能简便计算的要简便计算)4.2×(6.18-3.03)+6.315.02-6.8-(1.02+1.2)0.6×[(5-0.68)÷1.2]2.7÷4+6.3×0.25(6.02+2.8)÷0.4-2.053.08×3.5+6.2×3.08+3.08×0.3.
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(1)4.2×(6.18-3.03)+6.3, =4.2×3.15+6.3, =13.23+6.3, =19.53; (2)15.02-6.8-(1.02+1.2)悉镇, =15.02-6.8-1.02-1.2, =(15.02-1.02)-(6.8+1.2), =14-8,没谨 =6; (3)0.6×[(5-0.68)÷1.2], =0.6×[4.32÷1.2], =0.6×3.6, =2.16; (睁察粗4)2.7÷4+6.3×0.25, =2.7×0.25+6.3×0.25, =(2.7+6.3)×0.25, =9×0.25, =2.25; (5)(6.02+2.8)÷0.4-2.05, =8.82÷0.4-2.05, =22.05-2.05, =20; (6)3.08×3.5+6.2×3.08+3.08×0.3, =(3.5+6.2+0.3)×3.08, =10×3.08, =30.8. |
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