Question

Anna said that the product of 78⋅112=7278·112=72.

Answer 1

Answer:

Anna's answer is wrong. The correct answer is $\frac{21}{16}$ or $1\frac{5}{16}$.

Step-by-step explanation:

According to the Anna's statement the product of

$\frac{7}{8}\cdot 1\frac{1}{2}=\frac{7}{2}$

Simplify the left hand side of the above equation.

On simplifying the mixed fraction we get,

$\frac{7}{8}\cdot \frac{2+1}{2}$

$\frac{7}{8}\cdot \frac{3}{2}$

$\frac{21}{16}$

The right hand sides is

$\frac{7}{2}$

$\frac{21}{16}\neq \frac{7}{2}$

Since left hand sides is not equal to the rigth hand side, therefore Anna's answer is wrong.

Answer 2

Because she randomly added a 72 before the 78