题目内容
脱式计算. 52×8×6 |
568+56×5 |
390-16×3 |
(316-209)×7. |
分析:(1)按运算顺序从左往右依次计算;
(2)先算乘法,再算加法;
(3)先算乘法,再算减法;
(4)先算括号内的,再算括号外的.
(2)先算乘法,再算加法;
(3)先算乘法,再算减法;
(4)先算括号内的,再算括号外的.
解答:解:(1)52×8×6,
=416×6,
=2496;
(2)568+56×5,
=568+280,
=848;
(3)390-16×3,
=390-48,
=342;
(4)(316-209)×7,
=107×7,
=749.
=416×6,
=2496;
(2)568+56×5,
=568+280,
=848;
(3)390-16×3,
=390-48,
=342;
(4)(316-209)×7,
=107×7,
=749.
点评:此题考查了整数的脱式计算,特别注意运算顺序和运算法则.
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