A-A+
计算下面各题 能简便的一定要简便.2-(14+17)×411149÷23-59÷2334×7
问题详情
2-(
参考答案
(1)2-(14+17)×411,
=2-1128×411,
=2-17,
=167;
(2)149÷23-59÷23,
=149×32-59×32,
=(149-59)×32,
=1×32,
=32;
(3)34×72.8+7245÷4,
=34×72.8+72.8×14,
=72.8×(34+14),
=72.8×1,
=72.8;
(4)(38+127)×16+1127,
=38×16+127×16+1127,
=6+1627+1127,
=6+(1627+1127),
=6+1,
=7;
(5)24×(14+16-13),
=24×14+24×16-24×13,
=6+4-8,
=2;
(6)[815-(23-715)]×1514,
=[(815-23+715)]×1514,
=[815+715-23]×1514,
=13×1514,
=514.
考点: