题目内容
计算,写出计算过程
81+19×11= | 67×70-26= | 25×(96-52)= | 2.3+3.2-5.5= |
解:
(1)81+19×11,
=81+209,
=290;
(2)67×70-26,
=4690-26,
=4664;
(3)25×(96-52),
=25×44,
=1100;
(4)2.3+3.2-5.5,
=5.5-5.5,
=0.
分析:(1)先算乘法,再算加法;
(2)先算乘法,再算减法;
(3)先算小括号里面的加法,再算乘法;
(4)先算加法,再算减法.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可.
(1)81+19×11,
=81+209,
=290;
(2)67×70-26,
=4690-26,
=4664;
(3)25×(96-52),
=25×44,
=1100;
(4)2.3+3.2-5.5,
=5.5-5.5,
=0.
分析:(1)先算乘法,再算加法;
(2)先算乘法,再算减法;
(3)先算小括号里面的加法,再算乘法;
(4)先算加法,再算减法.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可.
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