Question

S. A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his
answer greater than the correct answer? (Hint: Do you need to do both the
multiplications?)​

Answer 1

Answer:

yes the answer is 405216

Answer 2

Answer:

65123

We need not do both the multiplications.

Step-by-step explanation:

Given,

A student multiplied 7236 by 65 instead of multiplying by 56.

To find,

i) By how much was his answer greater than the actual answer?

ii) Do you need to do both the multiplication?

i)

$wrong \: multiplication = 7236 \times 65$

$right \: multiplication = 7236 \times 56$

Instead of doing both the multiplication, we can simply subtract the multiplicators

$65 - 56 = 9$

$7236 \times 9 = 65123$

$\therefore$ His calculation is greater than the correct calculation by 65123.

ii) No, we need not necessarily need to do both the multiplications.