329×21÷47          
(789+1143)÷84
430-32×(27-18)
1000-962÷(13+24)
(123+99)×(47-28)
758-408×16÷32.
分析:(1)先算乘法,再算除法;
(2)先算加法,再算除法;
(3)先算小括號里面的減法,再算乘法,最后算括號外面的減法;
(4)先算加法,再算除法,最后算減法;
(5)先算加法和減法,再算乘法;
(6)先算乘法,再算除法,最后算減法.
解答:解:(1)329×21÷47,
=6909÷47,
=147;

(2)(789+1143)÷84,
=1932÷84,
=23;

(3)430-32×(27-18),
=430-32×9,
=430-288,
=142;

(4)1000-962÷(13+24),
=1000-962÷37,
=1000-26,
=974;

(5)(123+99)×(47-28),
=222×19,
=4218;

(6)758-408×16÷32,
=758-6528÷32,
=758-204,
=554.
點(diǎn)評:考查了整數(shù)的四則混合運(yùn)算,先弄清運(yùn)算順序,然后再進(jìn)行計(jì)算.
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