问题
解答题
递等式计算(能简便计算的要简便):
(1)5787-329-1071
(2)52×11+11×18
(3)72÷2×5
(4)65+65÷5
(5)912-512+88.
答案
(1)5787-329-1071,
=5787-(329+1071),
=5787-1400,
=4387;
(2)52×11+11×18,
=(52+18)×11,
=70×11,
=770;
(3)72÷2×5,
=36×5,
=180;
(4)65+65÷5,
=65+13,
=78;
(5)912-512+88,
=400+88,
=488.