问题 解答题
计算下面各题.(能简便的要用简便方法计算)
800-600÷20
18×(537-488)39×101
735÷15×675×299+75720÷16÷5.
答案

(1)800-600÷20,

=800-30,

=770;

(2)18×(537-488),

=18×49,

=18×(50-1),

=18×50-18,

=900-18,

=882;

(3)39×101,

=39×(100+1),

=39×100+39,

=3939;

(4)735÷15×6,

=49×6,

=294;

(5)75×299+75,

=75×(299+1),

=75×300,

=22500;

(6)720÷16÷5,

=720÷(16×5),

=720÷80,

=9.

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