题目内容
用递等式计算.
360+612÷12 128×68-36 182÷14+27 (648+245)×12.
360+612÷12 128×68-36 182÷14+27 (648+245)×12.
分析:(1)先算除法,再算加法;
(2)先算乘法,再算减法;
(3)先算除法,再算加法;
(4)先算小括号里面的加法,再算括号外的乘法.
(2)先算乘法,再算减法;
(3)先算除法,再算加法;
(4)先算小括号里面的加法,再算括号外的乘法.
解答:解:(1)360+612÷12,
=360+102,
=462;
(2)128×68-36,
=8704-36,
=8668;
(3)182÷14+27,
=13+27,
=40;
(4)(648+245)×12,
=893×12,
=10716.
=360+102,
=462;
(2)128×68-36,
=8704-36,
=8668;
(3)182÷14+27,
=13+27,
=40;
(4)(648+245)×12,
=893×12,
=10716.
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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