Time | Statistical Investigation

Rounding is a maths strategy that simplifies a number to the nearest, one, ten, hundred and ect. Addition is a maths stategy that connects a number to another number. Division is the process of sharing/separating a number equally.

To round a number like: 24.83, people usually look at the last decimal which is '3'. If the number is 0-4, people should round down. If the number is 5-9, people round up. The last decimal point is 3, so round down. When rounding down, the second number does not change. The number changes to 24.8. If the number was 24.27, round up. The second number would change to 24.5.

When adding a decimal number, people round the number to make it more easier. Adding decimal numbers is like adding whole numbers. If the equation was: 17.46 + 19.39. Add the 0.06 and the 0.09 together. 0.06 + 0.09 = 0.15, because the 10 shifts to the tenths column. Then add the 0.4 and the 0.3. 0.4 + 0.3 = 0.7. After that, add the 0.15 and the 0.7. 0.15 + 0.7 = 0.85.

Dividing a decimal number is the process of sharing the number equally, between things. For example: if the equation was, 95.55 ÷ 5. First divide 95. 95 ÷ 5 = 19, because 19 x 5 = 95. Then divide 0.55. 0.55 ÷ 5 = 0.11, because 0.11 x 5 = 0.55.

These maths strategy can help people get quick at answering equations and also help with future events.

LI: To investigate units of time.