Firth grade * 0.8 Identify mistakes involving the order of operations JLJ
Tanvi tried to evaluate the expression 7 x [(19 - 1) = 2]. Here is her work:
7 x [(19 - 1) = 2]
= 7 x [18 - 2]
Step 1
= 7 X 9
Step 2
= 63
Step 3
Is Tanvi's work correct?
No, Tanvi made a mistake in Step 1. Tanvi subtracted before she multiplied.
The order of operations says to multiply before you subtract.
No, Tanvi made a mistake in Step 2. Tanvi divided before she multiplied. The
order of operations says to multiply before you divide.
Yes, Tanvi's work is corect.