问题 解答题

递等式计算,能巧算的要巧算.

(1)173+532+827+268

(2)36×4+2×36

(3)450÷9×3

(4)545-166+445.

答案

(1)173+532+827+268

=(173+827)+(532+268)

=1000+800

=1800

(2)36×4+2×36

=36×(4+2)

=36×6

=216

(3)450÷9×3

=50×3

=150

(4)545-166+445

=379+445

=824

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