问题 解答题
脱式计算(能简便的用简便方法计算)
960-720÷8×9
12×(736-656÷16)360÷9+3×21
927÷[630÷(34+36)]125×(8×2)+100125×88
230×24+240×7746×101-146(841-41)÷25×4.
答案

(1)960-720÷8×9,

=960-720÷8÷9,

=960-810,

=150;

(2)12×(736-656÷16),

=12×(736-41),

=12×695,

=12×(700-5),

=12×700-12×5,

=(10+2)×700-60,

=7000+1400-60,

=8340;

(3)360÷9+3×21,

=40+63,

=103;

(4)927÷[630÷(34+36)],

=927÷[630÷70],

=927÷9,

=103;

(5)125×(8×2)+100,

=125×8×2+100,

=1000×2+100,

=2000+100,

=2100;

(6)125×88,

=125×8×11,

=1000×11,

=11000;

(7)230×24+240×77,

=23×240+240×77,

=240×(23+77),

=240×100,

=24000;

(8)46×101-146,

=46×(100+1)-146,

=4600+46-146,

=4600-(146-46),

=4600-100,

=4500;

(9)(841-41)÷25×4,

=800÷25×4,

=8×100÷25×4,

=8×(100÷25)×4,

=8×4×4,

=32×4,

=128.

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