Math – LEAP Review – GLE’s Presented by Vicki Martinez

Number and Number Relations  Read and write place value in word, standard, and expanded form through 1,000,000.  Standard form = 4,078,341  Word Form = Four million, seventy-eight thousand, three hundred forty-one  Expanded Form = 4,000, , ,

2. Read, write, compare, and order whole numbers using place value concepts, through 1,000,000  Practice reading large numbers.  33,905,085  Compare numbers.  348,893 > 348,839  (> means greater than)  (< means less than)  90,045 < 99,045

Order the numbers  Order the numbers from least to greatest.   Answer: 

Order the Numbers  Order the numbers from greatest to least:  9,887 8,879 8,798 9,978  Answer:  9,978 9,887 8,879 8,798

3. Illustrate when a number is divisible by 2, 3, 5, or 10.  If the last digit is even, the number is divisible by 2.  Example:  ends in “6”. 6 is an even number. So 896 is divisible by 2.  29,765,433 - ends in “3”. 3 is an odd number. So this number is NOT divisible by 2.

Divisible by 3  If the sum of the digits is divisible by 3, the number is also.  Example:  345 ( =12 and 12 ÷ 3 =4)  That means that 345 is divisible by 3.  345 ( =13 and 13 is not divisible by 3). SO 345 is not divisible by 3.

Divisible by 4  If the last two digits from a number are divisible by 4, the number is also.  Example:  4,528 ( 28 ÷ 4 =7) So, since we can divide 28 by 4, the entire number is divisible by 4.

Divisible by 5  If the last digit is a 5 or a 0, the number is divisible by 5.  Example:  155 This number ends in 5, so it is divisible by 5.  150 This number ends in 0, so it is divisible by 5  153 This number is not divisible by 5.

Divisible by 10  If the number ends in 0, the number is divisible by 10.  Example:  340 ends in 0. It is divisible by 10.  343 does not end in 0. It is not divisible by 10.

4. Know all basic facts for multiplication and division through 12 x 12 and 144 ÷ 12.  games/quickpractice.htm games/quickpractice.htm

Prime Numbers  A prime number has exactly 2 factors, 1 and itself.  Example :  The factors of 5 are: 1 x 5  So 5 is a prime number.  The factors of 6 are 1 x 6; and 2 x 3.  6 is NOT a prime number.

Composite Number  A composite number has more than 2 factors.  Example :  The factors of 6 are 1 x 6; and 2 x 3.  6 is composite number because it has more than 2 factors.  The factors of 5 are: 1 x 5  So 5 is a NOT a composite number because it only has 2 factors.

5. Read and write decimals through hundredths and connect them to corresponding fractions.  Everything to the left of the decimal is a whole number. Everything to the right of the decimal is a fraction that can be written as a decimal.  You only have to remember tenths and hundredths.

Learn This!  A decimal is another way to write a fraction. In $4.25, $0.25 is part of a dollar.  It is 25/100 of a dollar.  O.25 = 25/100 = 1/4

Learn This!  A decimal is another way to write a fraction. In $4.50, $0.50 is part of a dollar.  It is 50/100 of a dollar.  O.50 = 50/100 = ½ = 2/4

Learn This!  A decimal is another way to write a fraction. In $4.75, $0.75 is part of a dollar.  It is 75/100 of a dollar.  O.75 = 75/100 = 3/4

In a decimal, the farther right the number the smaller it's value.  = _2_ hundreds + _3_ tens + _4_ ones +_1 tenths

Always remember all decimals can be written as fractions.  O.7 = seven tenths = 7/10  0.5 = five tenths = 5/10 = ½  0.70 = seventy hundredths = 70/100  0.50 = fifty hundredths = 50/100

Fractions and Decimals  1.4 = one and four tenths  1.4 = 1 4  10  39.6 = thirty nine and six tenths  39.6 = 39 6  10

Fractions & Decimals: Hundredths  1.34 = one and thirty four hundredths  1.34 = 1 34  100

In a decimal, the farther right the number the smaller it's value.  = __hundreds + __tens + __ ones +_ tenths  = _2_ hundreds + _3_ tens + _4_ ones +_1 tenths