Question

What is $720–200?$

• A. $220$
• B. $120$
• C. $420$
• D. $520$

Answer 1

The correct option is D $520$

$0\text{ones}–0\text{ones}=0$
$2\text{tens}–0\text{tens}=2\text{tens}$
$7\text{hundreds}–2\text{hundreds}=5\text{hundreds}$

$5\text{hundreds}+2\text{tens}+0\text{ones}=520$

Hence, option C is correct