Find the number that should replace the question mark (?): \(\displaystyle\left(?\times\frac{3}{8}\right)\div6=4.8-1.05\)
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 60
Work out the right side, then undo the operations on the left in reverse order: undo ÷ 6 by multiplying by 6, and undo × \(\frac{3}{8}\) by multiplying by \(\frac{8}{3}\).
Right side: \(4.8-1.05=3.75\)
\(\displaystyle?\times\frac{3}{8}=3.75\times6=22.5\)
\(\displaystyle?=22.5\times\frac{8}{3}=60\)