问题 解答题

用简便的方法计算.

2000÷125÷8

25×96

99×38+38

328-164+72-36

98+998+9998+8.

答案

(1)2000÷125÷8,

=2000÷(125×8),

=2000÷1000,

=2;

(2)25×96,

=25×4×24,

=100×24,

=2400;

(3)99×38+38,

=(99+1)×38,

=100×38,

=3800;

(4)328-164+72-36,

=(328+72)-(164+36),

=400-200,

=200;

(5)98+998+9998+8,

=(100-2)+(1000-2)+(10000-2)+8,

=11100+(8-6),

=11100+2,

=11102.

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