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.