Question

Cost of painting 100.5 sq m area at a rate of $ 2.5 per sq m will be

Answer 1

Cost of painting $=\text{Area}\times \text{Rate}$
Cost of painting$=100.5\times 2.5$
Steps to solve $100.5\times 2.5$
Step 1: Count the number of digits after decimal point for both the numbers and add them.i.e$1+1=2$

Step 2: Ignore a decimal point and perform the multiplication, as you would with whole numbers as follows

Step 3: Now place a decimal point back.
100.5 and 2.5 has 2 decimal places in total. So, move the decimal point 2 places to the left in the product.

Hence the cost of painting is $ 251.25