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用简便方法计算58+135+65500-243-575600÷4÷25125×564800÷(16×15)81×65+81×35
题目详情
用简便方法计算
58+135+65 | 500-243-57 | 5600÷4÷25 |
125×56 | 4800÷(16×15) | 81×65+81×35 |
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答案和解析
(1)58+135+65
=58+(135+65)
=58+200
=258;
(2)500-243-57
=500-(243+57)
=500-300
=200;
(3)5600÷4÷25
=5600÷(4×25)
=5600÷100
=56;
(4)125×56
=125×8×7
=1000×7
=7000;
(5)4800÷(16×15)
=4800÷16÷15
=300÷15
=20;
(6)81×65+81×35
=81×(65+35)
=81×100
=8100.
=58+(135+65)
=58+200
=258;
(2)500-243-57
=500-(243+57)
=500-300
=200;
(3)5600÷4÷25
=5600÷(4×25)
=5600÷100
=56;
(4)125×56
=125×8×7
=1000×7
=7000;
(5)4800÷(16×15)
=4800÷16÷15
=300÷15
=20;
(6)81×65+81×35
=81×(65+35)
=81×100
=8100.
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