问题
解答题
计算下面各题,能简算的要简算: 1488+1068÷89 4.2÷1.5-0.36 250×
|
答案
①1488+1068÷89
=1488+12
=1500;
②4.2÷1.5-0.36
=2.8-0.36
=2.44;
③250×
+250×1 5 4 5
=250×(
+1 5
)4 5
=250×1
=250;
④
×1 2
-4 5
÷1 12 1 3
=
-2 5 1 4
=
.3 20