考點(diǎn):整數(shù)四則混合運(yùn)算
專題:運(yùn)算順序及法則
分析:(1)先算乘法和除法,再算加法;
(2)先算乘法,再算加法,最后算減法;
(3)先算除法,再算減法,最后算加法;
(4)先算乘法,再算減法,最后算除法;
(5)按從左向右的順序進(jìn)行計(jì)算;
(6)先算小括號(hào)里面的減法,再算加法,最后算括號(hào)外面的減法.
解答:
解:(1)35×128+2680÷67
=4480+40
=4520;
(2)9300-(82+68×106)
=9300-(82+7208)
=9300-7290
=2010;
(3)8630+(210-438÷73)
=8630+(210-6)
=8630+204
=8834;
(4)2790÷(250×12-2991)
=2790÷(3000-2991)
=2790÷9
=310;
(5)72.8-8.6+5.84
=64.2+5.84
=70.04;
(6)40-(3.5-2.75+0.86)
=40-(0.75+0.86)
=40-1.61
=38.39.
點(diǎn)評(píng):考查了四則混合運(yùn)算注意運(yùn)算順序和運(yùn)算法則,然后再進(jìn)一步計(jì)算.