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简便计算.(1)169+226+274(2)(923+174)+26(3)(75×25)×4(4)2×34×50(5)357+432+368+153(6)13×125×7×8(7)385-173+615-227(8)16×(125×6)(9)9+98+997+9996+99995+999994+21.

题目详情
简便计算.
(1)169+226+274
(2)(923+174)+26
(3)(75×25)×4
(4)2×34×50
(5)357+432+368+153
(6)13×125×7×8
(7)385-173+615-227
(8)16×(125×6)
(9)9+98+997+9996+99995+999994+21.
▼优质解答
答案和解析
(1)169+226+274,
=169+(226+274),
=169+500,
=669;

(2)(923+174)+26,
=923+(174+26),
=923+200,
=1123;

(3)(75×25)×4,
=75×(25×4),
=75×100,
=7500;

(4)2×34×50,
=2×50×34,
=100×34,
=3400;

(5)357+432+368+153,
=(357+153)+(432+368),
=510+800,
=1310;

(6)13×125×7×8,
=(13×7)×(125×8),
=91×1000,
=91000;

(7)385-173+615-227,
=(385+615)-(173+227),
=1000-400,
=600;

(8)16×(125×6),
=(8×2)×(125×6),
=(8×125)×(2×6),
=1000×12,
=12000;

(9)9+98+997+9996+99995+999994+21,
=(9+1)+(98+2)+(997+3)+(9996+4)+(99995+5)+(999994+6),
=10+100+1000+10000+100000+1000000,
=1111110.