a) 2,3 . 1,4 =
1
2 , 3
- 1 , 4
----------
+9 , 2
2 3, 0
---------
3 , 22
b) ( – 7 , 7 ) . ( – 2 , 1 ) =
7 , 7
- 2 , 1
+ 7 , 7
1 5 , 4 0
------------
1 6 , 7 7
☆
|| ASS: Blues / 02|09|21 / às 10:57
