用你喜欢的方法计算.
0.6+0.94-0.208
4.85×1.25×8
(64-22.4÷1.4)×1.218.3-6.25-3.752.8×3.6+1.4×2.86.6÷〔14.5-(1.7+1.8)〕
网友回答
解:
(1)0.6+0.94-0.208,
=1.54-0.208,
=1.332;
(2)4.85×1.25×8,
=4.85×(1.25×8),
=4.85×10,
=48.5;
(3)(64-22.4÷1.4)×1.2,
=(64-16)×1.2,
=48×1.2,
=57.6;
(4)18.3-6.25-3.75,
=18.3-(6.25+3.75),
=18.3-10,
=8.3;
(5)2.8×3.6+1.4×2.8,
=2.8×(3.6+1.4),
=2.8×5,
=14;
(6)6.6÷[14.5-(1.7+1.8)],
=6.6÷[14.5-3.5],
=6.6÷11,
=0.6.
解析分析:(1)先计算加法,再计算减法;(2)根据乘法结合律进行简算;(3)先计算小括号里面的除法,再计算小括号里面的减法,最后计算小括号外面的乘法;(4)18.3连续减去6.25与3.75,等于减去6.25与3.75的和;(5)根据乘法分配律进行简算;(6)先计算小括号里面的加法,再计算中括号里面的减法,最后计算除法.
点评:根据小数四混合运算的运算顺序进行计算即可,能简算要简算.