求教数学题,能简便计算的就简便计算:
981+5x9810+49x981=?
464-548+99+348=?
537-{543-163}-57=?
605x{268-14144÷68}=?
1983-246+154=?
53+47x47=?
人气:460 ℃ 时间:2019-12-29 13:24:03
解答
(1)1*981+50*981+49*981=(1+50+49)*981=100*981=98100
(2)464+99-200=363
(3)537-543+163-57=700-600=100
(4)605*(268-208)=605*60=36300
(5)1983-400=1583
(6)53+2209=2262
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