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.

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