There is no error in Sandra's work. The expression (3.3 - 4.2) - 2.8 + 5.7 can be simplified as follows:
(3.3 - 4.2) - 2.8 + 5.7
= -0.9 - 2.8 + 5.7
= -3.7 + 5.7
= 2
Therefore, Sandra's work is correct.
Sandra is showing her work in simplifying (3.3 - 4.2) - 2.8 + 5.7 identify any error in her work or reasoning
1 answer