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用简便方法计算下面各题.1457-728-2721529-(529-480)158+36+42+26488×12517×138+138×73200÷16÷2.
题目详情
用简便方法计算下面各题.
1457-728-272
1529-(529-480)
158+36+42+264
88×125
17×138+138×73
200÷16÷2.
1457-728-272
1529-(529-480)
158+36+42+264
88×125
17×138+138×73
200÷16÷2.
▼优质解答
答案和解析
(1)1457-728-272,
=1457-(728+272),
=1457-1000,
=457;
(2)1529-(529-480),
=1529-529+480,
=1000+480,
=1480;
(3)158+36+42+264,
=(158+42)+(36+264),
=200+300,
=500;
(4)88×125,
=11×8×125,
=11×(8×125),
=11×1000,
=11000;
(5)17×138+138×73,
=(17+73)×138,
=90×138,
=12420;
(6)200÷16÷2,
=200÷2÷16,
=100÷16,
=6.25.
=1457-(728+272),
=1457-1000,
=457;
(2)1529-(529-480),
=1529-529+480,
=1000+480,
=1480;
(3)158+36+42+264,
=(158+42)+(36+264),
=200+300,
=500;
(4)88×125,
=11×8×125,
=11×(8×125),
=11×1000,
=11000;
(5)17×138+138×73,
=(17+73)×138,
=90×138,
=12420;
(6)200÷16÷2,
=200÷2÷16,
=100÷16,
=6.25.
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