Question

Help the young princess with her homework by finding the missing number:
$54\times 120=$ __ $+400+80$

• A. 5000
• B. 5500
• C. 6000
• D. 6500

Answer 1

The correct option is C 6000

The young princess have to multiply $54$ with $120$.

Now, 54 can be expressed as: $54=50+4$
and,
$120=100+20$.

So, write the product $54\times 120$ as $(50+4)\times (100+20)$.

Calculating the product using Box Method,

Hence,
$54\times 120=5000+1000+400+80$.
$=6000+400+80$

Comparing this with,
$54\times 120=$ __ $+400+80$
you get the missing number as $6000$