题目内容
计算下面各题,能简便的要用简便方法计算. 245-525÷25 |
37×25×4 |
480÷60×122 | 138+44+62 |
22×(23+27)125×16. |
分析:(1)按照先算第二级运算,再算第一级运算顺序解答,
(2)运用乘法结合律解答,
(3)按照从左到右顺序解答,
(4)运用加法交换律解答,
(5)按照先算括号里面的,再算括号外面的顺序解答,
(6)化16=8×2,再运用乘法结合律解答.
(2)运用乘法结合律解答,
(3)按照从左到右顺序解答,
(4)运用加法交换律解答,
(5)按照先算括号里面的,再算括号外面的顺序解答,
(6)化16=8×2,再运用乘法结合律解答.
解答:解:(1)245-525÷25
=245-21
=224;
(2)37×25×4
=37×(25×4)
=37×100
=3700;
(3)480÷60×122
=8×122
=976;
(4)138+44+62
=138+62+44
=200+44
=244;
(5)22×(23+27)
=22×50
=1100;
(6)125×16
=125×8×2
=1000×2
=2000.
=245-21
=224;
(2)37×25×4
=37×(25×4)
=37×100
=3700;
(3)480÷60×122
=8×122
=976;
(4)138+44+62
=138+62+44
=200+44
=244;
(5)22×(23+27)
=22×50
=1100;
(6)125×16
=125×8×2
=1000×2
=2000.
点评:本题主要考查学生依据四则运算计算方法,以及正确运用简便方法解决问题的能力.
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