问题 解答题
脱式计算,能简便运算的要简便运算
770÷5÷7739+144+6127×4×5857-318-182240÷3÷8.
答案

(1)770÷5÷77,

=770÷77÷5,

=10÷5,

=2;

(2)39+144+61,

=(39+61)+144,

=100+144,

=244;

(3)27×4×5,

=27×(4×5),

=27×20,

=540;

(4)857-318-182,

=857-(318+182),

=857-500,

=357;

(5)240÷3÷8,

=240÷(3×8),

=240÷24,

=10.

单项选择题 A1型题
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