问题
解答题
用递等式计算.
16×[125÷(251-226)]
25×35×120
5600÷[(38+18)×2]
59×(481-279)
答案
(1)16×[125÷(251-226)]
=16×[125÷25]
=16×5
=80;
(2)25×35×120
=(25×40)×(35×3)
=1000×105
=105000;
(3)5600÷[(38+18)×2]
=5600÷[56×2]
=5600÷56÷2
=100÷2
=50;
(4)59×(481-279)
=59×202
=59×200+59×2
=11800+118
=11918.