Question

1 1/2 x 28
What is the answer?

Answer 1

$\huge{ \boxed{ \tt{ \color{navy}{Answer:}}}}$

$\large\frac{11}{2} \times 28$

$\large = \frac{11}{ \cancel2} \times\cancel{28}$

$\large = 11 \times 14$

$\large = 154$

Answer 2

To solve : $1\frac{1}{2} \times 28$

solution:

• Multiplication is a process of repetitive addition of integers.

• Multiplication rules for integers :

1. If two negative integers are multiplied then the product obtained is positive integer. i.e. $(-) \times(-)=+$
2. If one negative and one positive integers are multiplied then the product obtained is negative integer. i.e. $(-) \times(+)=-$
3. If both positive integers are multiplied then the product obtained is positive integer. i.e. $(+) \times(+)=+$

• Therefore according to above rule we solve.

• $1\frac{1}{2} \times 28$

       $=\frac{3}{2} \times 28 \\= 3\times 14 \\= 42$

Hence, product of  $1\frac{1}{2} \times 28$  is $42$ .