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25+5×20= 5000÷300=
68-14+6= 70×800=
1000÷25= 2727÷9=
39×4-9×4= 8×(120-12)=
分析:(1)先算乘法,再算加法;
(2)把被除数和除数分别缩小100倍,再计算;
(3)从左往右依次运算;
(4)先算7×8=56,在56后面添上3个0即可;
(5)(6)注意数位对齐;
(7)先算乘法,再算减法;
(8)先算括号内的,再算括号外的.
解答:解:(1)25+5×20,
=25+100,
=125;

(2)5000÷300,
=50÷3,
=
50
3


(3)68-14+6,
=54+6,
=60;

(4)70×800=56000;

(5)1000÷25=40;

(6)2727÷9=303;

(7)39×4-9×4,
=156-36,
=120;

(8)8×(120-12),
=8×108,
=864.
点评:此题主要考查整数的四则混合运算的运算顺序,以及对整数除法运算方法的考查.
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