Question

Multiply: (7.2)(0.34) =
1) 14.12
2) 0.234
3) 7.64
4) 2.448

Answer 1

To multiply 7.2 by 0.34, you perform the multiplication of the numbers as whole numbers and then adjust the decimal point according to the total number of decimal places from both original numbers. The correct answer, after placing the decimal point for three decimal places, is 2.448.

Step-by-step explanation:

To multiply 7.2 by 0.34, you align the decimal points and multiply as if they are whole numbers. Then, you count the total number of decimal places in both numbers. In this case, there are one decimal place in 7.2 and two decimal places in 0.34, totaling three decimal places. So, the product of 7.2 (which is 72 with one decimal place moved) and 0.34 (which is 34 with two decimal places moved) is 2448, but you must include the three decimal places in the answer, making it 2.448.

To present the calculation step by step:

1. Multiply 72 by 34 to get 2448.
2. Count the number of decimal places in the original numbers (1 in 7.2 and 2 in 0.34), which is 3 in total.
3. Place the decimal point in the answer (2448) so that there are three digits after it, resulting in 2.448.

Therefore, the correct answer is 2.448, which corresponds with option 4).