问题 解答题
简便算法
250×60

630÷35÷2

125×16

800÷32
25×36810÷5422×6×555×14.
答案

(1)250×60,

=(250×4)×(60÷4),

=1000×15,

=15000;

(2)630÷35÷2,

=630÷(35×2),

=630÷70,

=9;

(3)125×16,

=125×8×2,

=1000×2,

=2000;

(4)800÷32,

=(800÷8)÷(32÷8),

=100÷4,

=25;

(5)25×36,

=25×4×9,

=100×9,

=900;

(6)810÷54,

=(810÷9)÷(54÷9),

=90÷6,

=15;

(7)22×6×5,

=22×5×6,

=110×6,

=660;

(8)55×14,

=55×2×7,

=110×7,

=770.

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单项选择题