题目内容
用递等式计算:
4.97+0.7-2.34 | 40-(3.8+0.75) | 65.6-(14.3-8.3) |
45+32×4 | (47+33)×26 | (132-17)÷(31-8) |
考点:小数四则混合运算,整数四则混合运算
专题:计算题
分析:(1)按照从左向右的顺序进行计算;
(2)先算加法,再算减法;
(3)先算小括号里面的减法,再算括号外面的减法;
(4)先算乘法,再算加法;
(5)先算加法,再算乘法;
(6)先算减法,再算除法.
(2)先算加法,再算减法;
(3)先算小括号里面的减法,再算括号外面的减法;
(4)先算乘法,再算加法;
(5)先算加法,再算乘法;
(6)先算减法,再算除法.
解答:
解:(1)4.97+0.7-2.34
=5.67-2.34
=3.33;
(2)40-(3.8+0.75)
=40-4.55
=35.45;
(3)65.6-(14.3-8.3)
=65.6-6
=59.6;
(4)45+32×4
=45+128
=173;
(5)(47+33)×26
=80×26
=2080;
(6)(132-17)÷(31-8)
=115÷23
=5.
=5.67-2.34
=3.33;
(2)40-(3.8+0.75)
=40-4.55
=35.45;
(3)65.6-(14.3-8.3)
=65.6-6
=59.6;
(4)45+32×4
=45+128
=173;
(5)(47+33)×26
=80×26
=2080;
(6)(132-17)÷(31-8)
=115÷23
=5.
点评:考查了四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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