题目内容
计算. 27+56-45 |
70-26+43 | 6×4+29 | 8×8-38 |
分析:(1)(2)按照从左到右的顺序计算;
(3)先算乘法,再算加法;
(4)先算乘法,再算减法.
(3)先算乘法,再算加法;
(4)先算乘法,再算减法.
解答:解:(1)27+56-45
=83-45
=38;
(2)70-26+43
=44+43
=87;
(3)6×4+29
=24+29
=53;
(4)8×8-38
=64-38
=26.
=83-45
=38;
(2)70-26+43
=44+43
=87;
(3)6×4+29
=24+29
=53;
(4)8×8-38
=64-38
=26.
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.
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