问题 解答题
用简便方法计算
89+124+11+76
125×64975-147-23
3000÷125÷8134×8+8×66365×99.
答案

(1)89+124+11+76

=(89+11)+(124+76),

=100+200,

=300;

(2)125×64

=125×8×8,

=1000×8,

=8000;

(3)975-147-23

=975-(147+23),

=975-170,

=805;

(4)3000÷125÷8

=3000÷(125×8),

=3000÷1000,

=3;

(5)134×8+8×66

=(134+66)×8,

=200×8,

=1600;

(6)365×99

=365×(100-1),

=365×100-365,

=36500-365,

=36135.

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