题目内容

3288-1999+212.769×101-769.7257-1044÷18×11.
39000÷60÷50.61×57-5040÷42.96×125×7×24.

解:(1)3288-1999+212,
=3288-2000+1+212,
=1288+1+212,
=(1288+212)+1,
=1500+1,
=1501;

(2)769×101-769,
=769×(101-1),
=769×100,
=76900,;

(3)7257-1044÷18×11,
=7257-58×11,
=7257-638,
=6619;

(4)39000÷60÷50,
=39000÷(60×50),
=39000÷3000,
=13;

(5)61×57-5040÷42,
=3477-120,
=3357;

(6)96×125×7×24,
=96×7×3×125×8,
=96×7×3×(125×8),
=672×3×1000,
=2016×1000,
=2016000.
分析:(1)用多减再加的方法进行简算;
(2)运用乘法的分配律进行简算;
(3)先算除法,再算乘法,最后算减法;
(4)运用除法的性质进行简算;
(5)先同时求出乘法算式和除法算式,再算减法;
(6)把24化成8×3进行计算即可.
点评:考查了整数四则混合运算的顺序,能简算的要简算.
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