The best thing about proplem solving is seeing hownother people solve proplems because i could use that strategies for other proplems.
I have lerent that written method is a easy strategie to use . an example of a proplem and my working is 160 + 389+197 =? 100 + 300 =400 60+80=140 140 +400=540 540+190=730 730+9+7=746 |