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计算.(能简便算的要简便算)468-128+132-3722196-884-116-1961998-(998-379)345+299800÷2467×993562-14×209+2881073÷(59-720÷24)36×28-2400÷15
题目详情
计算.(能简便算的要简便算)
468-128+132-372 | 2196-884-116-196 | 1998-(998-379) | 345+299 |
800÷24 | 67×99 | 3562-14×209+288 | 1073÷(59-720÷24) |
36×28-2400÷15 | 36×109-36×9 | 1308÷25÷4 | 121×78+121×23-121. |
▼优质解答
答案和解析
(1)468-128+132-372
=(468+132)-(128+372)
=600-500
=100;
(2)2196-884-116-196
=2196-196-(884+116)
=2000-1000
=1000;
(3)1998-(998-379)
=1998-998+379
=1000+379
=1379;
(4)345+299
=345+300-1
=645-1
=644;
(5)800÷24
=800÷8÷3
=100÷3
=
;
(6)67×99
=67×(100-1)
=67×100-67×1
=6700-67
=6633;
(7)3562-14×209+288
=3562-2926+288
=636+288
=924;
(8)1073÷(59-720÷24)
=1073÷(59-30)
=1073÷29
=37;
(9)36×28-2400÷15
=1008-160
=848;
(10)36×109-36×9
=36×(109-9)
=36×100
=3600;
(11)1308÷25÷4
=1308÷(25×4)
=1308÷100
=13.08;
(12)121×78+121×23-121
=121×(78+23-1)
=121×100
=12100.
=(468+132)-(128+372)
=600-500
=100;
(2)2196-884-116-196
=2196-196-(884+116)
=2000-1000
=1000;
(3)1998-(998-379)
=1998-998+379
=1000+379
=1379;
(4)345+299
=345+300-1
=645-1
=644;
(5)800÷24
=800÷8÷3
=100÷3
=
100 |
3 |
(6)67×99
=67×(100-1)
=67×100-67×1
=6700-67
=6633;
(7)3562-14×209+288
=3562-2926+288
=636+288
=924;
(8)1073÷(59-720÷24)
=1073÷(59-30)
=1073÷29
=37;
(9)36×28-2400÷15
=1008-160
=848;
(10)36×109-36×9
=36×(109-9)
=36×100
=3600;
(11)1308÷25÷4
=1308÷(25×4)
=1308÷100
=13.08;
(12)121×78+121×23-121
=121×(78+23-1)
=121×100
=12100.
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