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怎样算简便就怎样算350×[(120-60)÷15]125×25×32[285-(15+20)]×323×199+23203×199(80+4)×2572×5+72×4+7234×72+34×28.

题目详情
怎样算简便就怎样算
350×[(120-60)÷15]125×25×32[285-(15+20)]×323×199+23
203×199(80+4)×2572×5+72×4+7234×72+34×28.
▼优质解答
答案和解析
(1)350×[(120-60)÷15]
=350×[60÷15]
=350×4
=1400;

(2)125×25×32
=125×25×(8×4)
=(125×8)×(25×4)
=1000×100
=100000;

(3)[285-(15+20)]×3
=[285-35]×3
=250×3
=750;

(4)23×199+23
=23×(199+1)
=23×200
=4600;

(5)203×199
=203×(200-1)
=203×200-203×1
=40600-203
=40397;

(6)(80+4)×25
=80×25+4×25
=2000+100
=2100;

(7)72×5+72×4+72
=72×(5+4+1)
=72×10
=720;

(8)34×72+34×28
=34×(72+28)
=34×100
=3400.