问题
解答题
能简便的用简便方法计算.
|
答案
(1)3245-(245+678),
=3245-245-678,
=3000-678,
=2322;
(2)216+64×42÷28,
=216+2688÷28,
=216+96,
=312;
(3)88×125,
=8×11×125,
=(8×125)×11,
=1000×11,
=11000;
(4)15×27-3000÷25,
=405-120,
=285;
(5)99×38+38
=(99+1)×38,
=100×38,
=3800;
(6)4.02-3.5+0.98,
=4.02+0.98-3.5,
=5-3.5,
=1.5.