Question

1.
\

$$\begin{array}{r} 45 \\\\ \\times 14 \\\\ \\hline \\end{array}$$

2.
\

$$\begin{array}{r} 72 \\\\ \\times 25 \\\\ \\hline \\end{array}$$

3.
\

$$\begin{array}{r} 68 \\\\ \\times 23 \\\\ \\hline \\end{array}$$

4.
\

$$\begin{array}{r} 91 \\\\ \\times 11 \\\\ \\hline \\end{array}$$

Explanation:

1.

Step1: Multiply 45 by 4 (units place of 14)

$45\times4 = 180$

Step2: Multiply 45 by 10 (tens place of 14)

$45\times10 = 450$

Step3: Add the two results

$180 + 450 = 630$

Step1: Multiply 72 by 5 (units place of 25)

$72\times5 = 360$

Step2: Multiply 72 by 20 (tens place of 25)

$72\times20 = 1440$

Step3: Add the two results

$360 + 1440 = 1800$

Step1: Multiply 68 by 3 (units place of 23)

$68\times3 = 204$

Step2: Multiply 68 by 20 (tens place of 23)

$68\times20 = 1360$

Step3: Add the two results

$204 + 1360 = 1564$

Answer:

630

2.