题目内容
| 怎样简便就怎样算. 389+327+211 | 608-154-146 | 587-98 |
| 258+36×72 | 24×(9+11) | 365-79+121. |
(1)389+327+211
=389+211+327,
=600+327,
=927;
(2)608-154-146
=608-(154+146),
=608-300,
=308;
(3)587-98
=587-(100-2),
=587-100+2,
=487+2,
=489;
(4)258+36×72
=258+2592,
=2850;
(5)24×(9+11)
=24×20,
=480;
(6)365-79+121
=286+121,
=407.
=389+211+327,
=600+327,
=927;
(2)608-154-146
=608-(154+146),
=608-300,
=308;
(3)587-98
=587-(100-2),
=587-100+2,
=487+2,
=489;
(4)258+36×72
=258+2592,
=2850;
(5)24×(9+11)
=24×20,
=480;
(6)365-79+121
=286+121,
=407.
练习册系列答案
相关题目