Răspuns:
49x
81
--------
4 9
392
---------------
3969
34x
15
-------------------
170
34
---------------
510
28x
45
-------------------
140
112
------
1260
78x
13
------
234
78
-------------
1014
55x
44
------
220
220
-------
2420
84:2=42
8
----
=4
4
--------
=
84:3=28
6
---------
24
24
----------
==
54:3=18
3
-----
24
24
--------------
= =
86:2=43
8
----
= 6
6
-------
=
Explicație pas cu pas: