Question 18
Draw a ring around **all** calculations that are equivalent to 504
$10 \times 50 + 4$ $\quad$ $4 + 5 \times 100$
$100 + 4 \times 5$ $\quad$ $50 + 4 \times 100$
$54 \times 10$ $\quad$ $4 + 5 \times 50 \times 2$
$10 \times 50 + 4$ $\quad$ $4 + 5 \times 100$
$100 + 4 \times 5$ $\quad$ $50 + 4 \times 100$
$54 \times 10$ $\quad$ $4 + 5 \times 50 \times 2$
