问题
解答题
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答案
(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.