用简便方法计算37+22+63+45 53.24-47.5-...
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解决时间 2021-01-07 11:47
- 提问者网友:流星是天使的眼泪
- 2021-01-07 07:09
用简便方法计算37+22+63+45 53.24-47.5-...
最佳答案
- 五星知识达人网友:煞尾
- 2021-01-07 07:32
(1)37+22+63+45
=(37+63)+(22+45)
=100+67
=167;
(2)53.24-47.5-2.5
=53.24-(47.5+2.5)
=53.24-50
=3.24;
(3)17×43-43×7
=(17-7)×43
=10×43
=430;
(4)72×125
=9×8×125
=9×(8×125)
=9×1000
=9000;
(5)4900÷25÷4
=4900÷(25×4)
=4900÷100
=49;
(6)(100+4)×25
=100×25+4×25
=2500+100
=2600.
=(37+63)+(22+45)
=100+67
=167;
(2)53.24-47.5-2.5
=53.24-(47.5+2.5)
=53.24-50
=3.24;
(3)17×43-43×7
=(17-7)×43
=10×43
=430;
(4)72×125
=9×8×125
=9×(8×125)
=9×1000
=9000;
(5)4900÷25÷4
=4900÷(25×4)
=4900÷100
=49;
(6)(100+4)×25
=100×25+4×25
=2500+100
=2600.
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