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