A-A+
用你喜欢的方法计算下面各题.15+56+23 718-(518-19)
问题详情
用你喜欢的方法计算下面各题.
参考答案
(1)15+56+23,
=15+(56+23),
=15+32,
=1710;
(2)718-(518-19),
=718-518+19,
=19+19,
=29;
(3)524+14+23,
=1124+1624,
=98;
(4)34+49+14+29,
=(34+14)+(29+49),
=1+23,
=123;
(5)2-27-37,
=2-(27+37),
=2-57,
=127;
(6)38+27+18+57,
=(38+18)+(27+57),
=12+1,
=112.
考点:方法