Question

a candy bar is broken into two pieces. one piece is 33.641 mm long, and the second piece is 31.749 mm long. how long was the whole candy bar before it broke? mm

Explanation:

Step1: Identify the operation

To find the length of the whole candy bar, we need to add the lengths of the two pieces. So we add 33.641 mm and 31.749 mm.

Step2: Perform the addition

$$ 33.641 + 31.749 = 65.39 $$

We add the two decimal numbers: align the decimal points and add each column. The units place: 1 + 9 = 10, carry over 1. The tenths place: 4 + 4 + 1 = 9. The hundredths place: 6 + 7 = 13, carry over 1. The thousandths place: 3 + 3 + 1 = 7? Wait, no, wait: 33.641 is 33 units, 6 tenths, 4 hundredths, 1 thousandth. 31.749 is 31 units, 7 tenths, 4 hundredths, 9 thousandths. Adding the thousandths: 1 + 9 = 10 thousandths = 1 hundredth and 0 thousandths. Then hundredths: 4 + 4 + 1 = 9 hundredths. Tenths: 6 + 7 = 13 tenths = 1 unit and 3 tenths. Units: 33 + 31 + 1 = 65 units. So total is 65.39 mm.

Answer:

65.39