Mathematics
Grade6
Easy

Question

Multiply 2.8 × 72.

  1. 202.6
  2. 201.6
  3. 211.6
  4. 202.6

hintHint:

In decimal multiplication, first we have to add the number of digits after the decimal point in both the numbers for example, in the given question two numbers whose product is asked is 2.8 and 72 so the sum of the digits after the decimal point in both the numbers is 1 ( one in 2.8, i.e., 8 and zero in 72 ). Then we perform normal multiplication between 2.8 and 72 (ignoring the decimal point) and in the product that we get we need to put the decimal point after 1 digit( i.e., the sum of digits that we found at first) from right. And we will get our required answer.

The correct answer is: 201.6


Step by step solution:
Given two decimal numbers: 2.8 and 72
Now, we need to multiply the two decimal numbers
2.8
x  72
2016 (we got the product by ignoring the decimal point)
Now, we have to place the decimal point after 1 digit from the right, i.e., 201.6 which is the required product of the two numbers.
Thus, option (b) is the correct option.

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