number line

Suppose that J and K are on the number line. If JK=9 and J lies at 4 where could K be located? We'd need 9 spaces to the right of 4 or 9 spaces to the left of 4 to have JK be 9. To the right: K = 4 + 9 K = 13 K = 4 - 9 K = -5

you start at a point on the number line and move 4 units left. If you are now at 10, then what was your original point? Work backwards. If we're at 10, and we moved left, this means we add 4 to get back to our starting point: 10 + 4 = 14

distance between -2 and 9 on the number line Distance on the number line is the absolute value of the difference: D = |9 - -2| D = |11| D = 11

What fraction lies exactly halfway between 2/3 and 3/4? A) 3/5 B) 5/6 C) 7/12 D) 9/16 E) 17/24 Halfway means taking the average, which is dividing the sum of the fractions by 2 for 2 fractions: 1/2(2/3 + 3/4) 1/2(2/3) + 1/2(3/4) 1/3 + 3/8 We need common denominators, so we type this fraction...

Julius Caesar was born and 100 BC and was 66 years old when he died in which year did he die? BC means "Before Christ". On a timeline, it represents a negative number, where year 0 is the birth of Christ. So we have -100 + 66 = -34 -34 means 34 BC.