题目内容
计算. 6-1.75+2.08 | 12.7+12.5÷5 | 6-(1.75+2.08) |
96÷(15.4-12.2) | 5×3.6+5.2×0.35 | 9.4×[0.96÷(5.4÷0.9)] |
考点:小数四则混合运算
专题:运算顺序及法则
分析:(1)先算减法再算加法;
(2)先算除法再算加法;
(3)先算括号里的加法,再算括号外面的减法;
(4)先算括号里的减法,再算括号外面的除法;
(5)同时计算两个乘法,再计算加法;
(6)先算小括号里的除法,再计算中括号里的除法,最后算括号外面的乘法.
(2)先算除法再算加法;
(3)先算括号里的加法,再算括号外面的减法;
(4)先算括号里的减法,再算括号外面的除法;
(5)同时计算两个乘法,再计算加法;
(6)先算小括号里的除法,再计算中括号里的除法,最后算括号外面的乘法.
解答:
解:(1)6-1.75+2.08
=4.25+2.08
=6.33
(2)12.7+12.5÷5
=12.7+2.5
=15.2
(3)6-(1.75+2.08)
=6-3.83
=2.17
(4)96÷(15.4-12.2)
=96÷3.2
=30
(5)5×3.6+5.2×0.35
=18+1.82
=19.82
(6)9.4×[0.96÷(5.4÷0.9)]
=9.4×[0.96÷6]
=9.4×0.16
=1.504
=4.25+2.08
=6.33
(2)12.7+12.5÷5
=12.7+2.5
=15.2
(3)6-(1.75+2.08)
=6-3.83
=2.17
(4)96÷(15.4-12.2)
=96÷3.2
=30
(5)5×3.6+5.2×0.35
=18+1.82
=19.82
(6)9.4×[0.96÷(5.4÷0.9)]
=9.4×[0.96÷6]
=9.4×0.16
=1.504
点评:本题考查了小数的四则混合运算,关键是明确小数四则混合运算的运算顺序.
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