Anúncios
1
+8-10=??
-10
-18
+2
-2
2
-7-5=??
+12
-5
-12
-13
3
-228-480=??
-708
-252
+408
-699
4
-99+40=??
-59
+59
+50
-40
5
-4000+2998=???
-399
-1002
+1002
-500
6
+177+11=??
+188
-188
+11
+55
7
+30x+10=
+300
-300
