Step-by-step explanation:
2.1. find the sum of the following
869345.03
+ 45.236
--------------------
869390.266
2.2 find the difference
145.5
- 81.6
-----------
63.9
2.3. find the quotiention
__2.81__
_2.3_| 64.63
- 46
-------------
186
-184
-------------
23
- 23
-------------
0
2.4. find the product
13.5
× 9.2
-------------
270
+ 12150
----------------
124.2
