问题
解答题
用简便方法计算下面各题.
(1)1500-28-272
(2)99×48+48
(3)2000÷125÷8
(4)77+2.14+23+7.86.
答案
(1)1500-28-272,
=1500-(28+272),
=1500-300,
=1200;
(2)99×48+48,
=(99+1)×48,
=100×48,
=4800;
(3)2000÷125÷8,
=2000÷(125×8),
=2000÷1000,
=2;
(4)77+2.14+23+7.86,
=(77+23)+(2.14+7.86),
=100+10,
=110.