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2 nd Week of EOG Review Book. Divisibility Rules:. The rules for the following numbers: 2: when a number is even (20, 12, 16……) 3: Add the numbers up and if it is a multiple of three then it is divisible by three…(ex.. 36 = 3 + 6 = 9 which is a multiple of three)

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divisibility rules
Divisibility Rules:

The rules for the following numbers:

2: when a number is even (20, 12, 16……)

3: Add the numbers up and if it is a multiple of three then it is divisible by three…(ex.. 36 = 3 + 6 = 9 which is a multiple of three)

4: The last two numbers are a multiple of four…. (ex…228)

5: The number has to end in a five or zero …(ex…15, 20, 30……)

slide3
6: If the number is divisible by two and three then it is divisible by six.

9: the sum of the digits is a multiple of nine…..(ex…..33 = 3 + 3 = 9 which is a multiple of nine)

10: The number ends in zero….(ex….10, 200, 340…..)

converting fractions to decimals
Converting Fractions to Decimals
  • To convert a fraction to a decimal, divide the numerator by the denominator and add a decimal and two zero in the dividend. Keep adding zeros until it terminates or repeats.
  • You can also convert to decimals by getting the denominator to equal to 100. What ever you did to the denominator you do to the numerator.
  • 1. ¾ 2. 2/3 3. 3/5 4. 2/7
converting fractions to decimals1
Converting Fractions to Decimals
  • 4/5
  • 3/5
  • 7/9
  • 3/16
  • 2/3
  • 5/8
  • ½
  • 5/12
converting mixed numbers to decimals
Converting Mixed numbers to decimals
  • If there is a whole number with a fraction, write the whole number to the left of the decimal point. Then change the fraction to a decimal.
  • Change the fraction by dividing the denominator into the numerator and adding a decimal and two zero or by setting the bottom denominator to a 10, 100, or 1,000.
  • Example)
  • 1. 4 1/10 2. 16 2/3 3. 12 7/8
changing decimals to fractions
Changing Decimals to Fractions
  • 8 5/11
  • 15 3/5
  • 13 2/3
  • 30 1/3
  • 3 ½
  • 1 7/8
  • 7 1/4
changing decimals to fractions1
Changing Decimals to Fractions
  • Step1: Copy the decimal without the point. This will be the top number of the fraction
  • Step 2: The bottom number is a 1 with as many 0’s after it as there are digits in the top number.
  • Step 3: You then need to reduce the fraction

1. 0.2 2. 0.65 3. 0.125

changing decimals to fractions2
Changing Decimals to Fractions
  • 0.55
  • 0.6
  • 0.12
  • 0.75
  • 0.82
  • 0.03
  • 0.96