W4.4

Front

W4.4

Question:

work out (without calculator):

4.3 x 7.2

Back

Hint:

to do a fraction with decimals, in the first instance, forget the decimal.

eg: to solve 9.8 x 2.3 do 98 x 23

use the column or grid method

Then bring the decimal point in the answer. If you had two digits after the decimal point in the question, put two digits after the decimal point in your answer.

98 x 23 = 2254

so 9.8 x 2.3 = 22.54

Front

Answer:

43 x 72 = 3096

therefore:

4.3 x 7.2 = 30.96

Back

Check:

To make sure you have put yourr decimal point in the right place do the multiplication with your numbers rounded to the closest whole number, and that will give you a sense of scale for your answer.

4.3 rounds to 4

7.2 rounds to 7

4 x 7 = 28

4,3 is a bit more than 4

7.2 is a bit more than 7

my answer makes sense.