题目内容
脱式计算.
12×35÷28 | 1160÷58×17 | (985+233)÷58 | 972-110×6. |
分析:按整数四则运算顺序计算,
(1)先算乘法,再算除法;
(2)先算出除法,再算乘法;
(3)先算括号里的加法除法,再算除法;
(4)先算乘法,再算减法.
(1)先算乘法,再算除法;
(2)先算出除法,再算乘法;
(3)先算括号里的加法除法,再算除法;
(4)先算乘法,再算减法.
解答:解:(1)12×35÷28,
=420÷28,
=15;
(2)1160÷58×17,
=20×17,
=340;
(3)(985+233)÷58,
=1218÷58,
=21;
(4)972-110×6,
=972-660,
=312.
=420÷28,
=15;
(2)1160÷58×17,
=20×17,
=340;
(3)(985+233)÷58,
=1218÷58,
=21;
(4)972-110×6,
=972-660,
=312.
点评:此题是考查四则混合运算,要仔细观察算式的特点,认真计算解答.
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