题目内容
用递等式计算 201×47-9413 | 450÷25-16 | 352×(294-206) | (168+256)×79 |
考点:整数四则混合运算
专题:运算顺序及法则
分析:(1)先算乘法,再算减法;
(2)先算乘法,再算加法;
(3)先算减法,再算乘法;
(4)先算加法,再算乘法.
(2)先算乘法,再算加法;
(3)先算减法,再算乘法;
(4)先算加法,再算乘法.
解答:
解:(1)201×47-9413
=9447-9413
=34;
(2)450÷25-16
=18-16
=2;
(3)352×(294-206)
=352×88
=30976;
(4)(168+256)×79
=424×79
=33496.
=9447-9413
=34;
(2)450÷25-16
=18-16
=2;
(3)352×(294-206)
=352×88
=30976;
(4)(168+256)×79
=424×79
=33496.
点评:整数混合运算的关键是抓住运算顺序,正确按运算顺序计算即可.
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