题目内容
怎样简便就怎样算;
| 168+52+48 | 125×72 | (4+8)×25 | 125×32×8 | 136×99 | 156×l0l-156. |
(1)168+52+48,
=168+(52+48),
=168+100,
=268;
(2)125×72,
=125×8×9,
=1000×9,
=9000;
(3)(4+8)×25,
=4×25+8×25,
=100+200,
=300;
(4)125×32×8,
=125×8×32,
=1000×32,
=32000;
(5)136×99,
=136×(100-1),
=136×100-136×1,
=13600-136,
=13464;
(6)156×l0l-156,
=156×(101-1),
=156×100,
=15600.
=168+(52+48),
=168+100,
=268;
(2)125×72,
=125×8×9,
=1000×9,
=9000;
(3)(4+8)×25,
=4×25+8×25,
=100+200,
=300;
(4)125×32×8,
=125×8×32,
=1000×32,
=32000;
(5)136×99,
=136×(100-1),
=136×100-136×1,
=13600-136,
=13464;
(6)156×l0l-156,
=156×(101-1),
=156×100,
=15600.
练习册系列答案
相关题目