Cranford Public Schools Summer Math Practice Students ...
Cranford Public Schools Summer Math Practice Students Entering 7th Grade
7th Grade - Summer Math Packet
Unit: KNOWLEDGE of ALGEBRA, PATTERNS, and FUNCTIONS Objective: Write an algebraic expression to represent unknown quantities.
? A variable is a symbol, usually a letter, used to represent a number. ? Algebraic expressions are combinations of variables, numbers, and at least one operation.
Examples:
The sum of 5 and some number is written as: 5 + n because the operation that is associated with the word sum is addition.
The difference of a number and three tenths is written as: n - .3 because the operation that is associated with the word difference is subtraction.
1.)
2.)
a number plus 1 2
a number minus .7
3.)
4.)
the difference of twenty-one hundredths and a number
the sum of a number and forty-six
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7th Grade - Summer Math Packet
Unit: KNOWLEDGE of ALGEBRA, PATTERNS, and FUNCTIONS Objective: Evaluate an algebraic expression.
? A variable is a symbol, usually a letter, used to represent a number. ? Algebraic expressions are combinations of variables, numbers, and at least one operation. ? Multiplication in algebra can be shown as 4n or 4 x n ? The variables in an algebraic expression can be replaced with any number. ? Once the variables have been replaced, you can evaluate, or find the value of, the algebraic expression.
Examples:
Evaluate 44 + n if n= 9
44 + n original expression 44 + 9 replace the variable with it's value 53 solution
1.) Evaluate 150 + n if n = 15
2.) Evaluate 12n if n = 9
3.) Evaluate 15n + 19 if n = 1 3
4.) Evaluate 30n if n = 2.5
5.) Evaluate 24n ? k if n = 6 and k = 8
6.) Evaluate nk ? 2b + 8 if b = 1.5, k = 8, and n = 7
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7th Grade - Summer Math Packet
Unit: KNOWLEDGE of ALGEBRA, PATTERNS, and FUNCTIONS Objective: Evaluate numeric expressions using order of operations.
? A numerical expression is a combination of numbers and operations. ? The Order of Operations tells you which operation to perform first so that everyone gets the same final answer. ? The Order of Operations is: Parentheses, Exponents, Multiplication or Division (left to right), and Addition or
Subtraction (left to right.)
Examples:
48 ? (3 + 3) ? 22 48 ? 6 - 22 48 ? 6 ? 4 8 ? 4 4
original expression simplify the expression inside the parentheses calculate 22 divide 48 by 6 subtract 4 from 8
1.)
2.)
(8 + 1) x 12 ? 13
13 x 4 ? 72 ? 8
3.) 88 ? 16 x 5 + 2 ? 3
4.) 100 ? 52 x 43
5.) 45 ? 9 ? 3 + 2 x 3
6.) (52 + 33) x (81 + 9) ? 10
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7th Grade - Summer Math Packet
Unit: KNOWLEDGE of ALGEBRA, PATTERNS, and FUNCTIONS Objective: Determine the unknown in a linear equation (addition & subtraction).
? Addition equations: Subtract the same number from each side of the equation so that the two sides remain equal. ? Subtraction equations: Add the same number to each side of the equation so that the two sides remain equal.
Examples:
b + 3 = 6 -3 -3
b + 0 = 3 b =3
original equation subtract 3 from each side solution simplify
b?8= 4 +8 +8
b + 0 = 12 b = 12
original equation add 4 to each side solution simplify
1.)
2.)
g + 5 = 12
s ? 12 = 29
3.) m + 3.5 = 10.5
4.) k ? 5.5 = 8.5
5.) w + 6.25 = 22
6.) g ? 3.75 = 49.75
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