题目内容
脱式计算. 540÷6÷9 |
408÷(4×2) | 387-497÷7 |
(725-500)÷3 | 124×3÷2 | 500-124÷4. |
分析:(1)5)按照从左到右顺序解答,
(2)(4)按照先算括号里面的,再算括号外面的顺序解答,
(3)(6)按照先算第二级运算,再算第一级运算顺序解答.
(2)(4)按照先算括号里面的,再算括号外面的顺序解答,
(3)(6)按照先算第二级运算,再算第一级运算顺序解答.
解答:解:(1)540÷6÷9
=90÷9
=10;
(2)408÷(4×2)
=408÷8
=51;
(3)387-497÷7
=387-71
=316;
(4)(725-500)÷3
=225÷3
=75;
(5)124×3÷2
=372÷2
=186;
(6)500-124÷4
=500-31
=469.
=90÷9
=10;
(2)408÷(4×2)
=408÷8
=51;
(3)387-497÷7
=387-71
=316;
(4)(725-500)÷3
=225÷3
=75;
(5)124×3÷2
=372÷2
=186;
(6)500-124÷4
=500-31
=469.
点评:本题主要考查学生依据四则运算计算方法,正确进行计算的能力,关键是计算结果要准确.
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