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Name: Percent Decimal Fraction 1% 0.01 1/ 100 5% 0.05 1/ 20 10% 0.1 1/ 10 A right angle is an angle whose measure is 90°. 12.5 or 12 ½ % 0.125 1/ 8 20% 0.2 1/ 5 An obtuse angle is an angle whose measure is more than 90°, but less than 180° 25% 0.25 1/ 4 33.3 or 33 1/3 % 0.33… 1/ 3 50% 0.5 1/ 2 75% 0.75 3/ 4 80% 0.8 4/ 5 90% 0.9 9/ 10 99% 0.99 99/ 100 100% 1.0 1 whole An acute angle is an angle whose measure is less than 90° A straight angle is an angle whose measure is 180° A reflex angle is an angle whose measure is more than 180° HM TM Hundreds of Millions Tens of Millions M HTH TTH TH H T U Millions Hundreds of Thousands Tens of Thousands Thousands Hundreds Tens Units . th h th tenths hundredths thousandths The mean where you add up all the numbers and then divide by the number of values The median is the "middle" value in the list of numbers. To find the median, your numbers have to be listed in numerical order, so you may have to rewrite your list first. The mode is the value that occurs most often. If no number is repeated, then there is no mode for the list. The range is just the difference between the largest and smallest values. Ad ddition increase together sum more plus add total and Subtraction difference between subtract fewer decrease minus take from reduce take away Division divided by share divide share equally divisible by divide into group Multiplication multiplied by multiply product groups of lots of times table times 12 hour times into 24 hour times Examples: Can you see that morning times in 24 hour format stay the same? 8.00am becomes 0800 hrs 7.45 a.m. becomes 0745 hrs 10.50 am becomes 1050 hrs But for afternoon and evening times you always add on 12 hours: 2.00pm becomes 1400 hrs 5.15 p.m. becomes 1715 hrs 10.50 p.m. becomes 2250 hrs