Patterns And Relations Worksheet - Grade 7 Page 40
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46What Do I Need to Know?
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A whole number is divisible by:
2 if the number is even
3 if the sum of the digits is divisible by 3
4 if the number represented by the last 2 digits is divisible by 4
5 if the ones digit is 0 or 5
6 if the number is divisible by 2 and by 3
8 if the number represented by the last 3 digits is divisible by 8
9 if the sum of the digits is divisible by 9
10 if the ones digit is 0
A whole number cannot be divided by 0.
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A variable is a letter or symbol.
It represents a set of numbers in an algebraic expression.
A variable can be used to write an algebraic expression:
“3 less than a number” can be written as n
3.
A variable represents a number in an equation.
A variable can be used to write an equation.
“4 more than a number is 11” can be written as x
4
11.
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An algebraic expression can be evaluated by substituting
a number for the variable.
6r
3 when r
2 is: 6
2
3
12
3
15
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A relation describes how the output is related to the input.
A relation can be displayed using a table of values or a graph.
When points of a relation lie on a straight line, it is a linear relation.
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An equation can be solved using tiles.
43
Unit Review
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