问题 解答题
递等式计算,能巧算的要巧算
472+239+6618324-813-1877218÷9×7320×8÷5.
答案

(1)472+239+661,

=472+(239+661),

=472+900,

=1372;

(2)8324-813-187

=8324-(813+187),

=8324-1000,

=7324;

(3)7218÷9×7,

=802×7,

=5614;

(4)320×8÷5,

=320÷5×8,

=64×8,

=(60+4)×8,

=480+32,

=512.

单项选择题
单项选择题