题目内容
递等式计算.
(927-108)÷7 | 742÷7×3 | 850-250×3 | 702÷2÷3 | 9×(25+55) | 106×2×5 |
分析:(1)先算小括号里面的减法,再算括号外的除法;
(2)(4)按照从左到右的顺序计算;
(3)先算乘法,再算减法;
(5)先算小括号里面的加法,再算括号外的乘法;
(6)运用乘法结合律简算.
(2)(4)按照从左到右的顺序计算;
(3)先算乘法,再算减法;
(5)先算小括号里面的加法,再算括号外的乘法;
(6)运用乘法结合律简算.
解答:解:(1)(927-108)÷7,
=819÷7,
=117;
(2)742÷7×3,
=106×3,
=318;
(3)850-250×3,
=850-750,
=100;
(4)702÷2÷3,
=351÷3,
=117;
(5)9×(25+55),
=9×80,
=720;
(6)106×2×5,
=106×(2×5),
=106×10,
=1060.
=819÷7,
=117;
(2)742÷7×3,
=106×3,
=318;
(3)850-250×3,
=850-750,
=100;
(4)702÷2÷3,
=351÷3,
=117;
(5)9×(25+55),
=9×80,
=720;
(6)106×2×5,
=106×(2×5),
=106×10,
=1060.
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
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