问题
解答题
计算下面各题,能简算的要简算: 7.54+
0.4÷
99×
|
答案
7.54+
+2.46+12 7
,16 7
=(7.54+2.46)+(
+12 7
),16 7
=10+4,
=14;
0.4÷
+15 4
×2 5
,4 15
=
×2 5
+4 15
×2 5
,4 15
=
×(2 5
+4 15
),4 15
=
×2 5
,8 15
=
;16 75
÷(3 23
-6 7
×5 6
),3 10
=
÷(3 23
-6 7
),1 4
=
÷3 23
,17 28
=
;84 391
99×
+23 25
,23 25
=(99+1)×
,23 25
=100×
,23 25
=92.