Preview: Solving Number Problems: Odd Numbers and Doubling
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Introduction
In this worksheet, we will learn how to express an odd number as "double a number plus one" and then identify whether the result is an odd or even number.
For Example:
Question:
Write this odd number as "double a number plus one". Then say whether your answer is odd or even.
209 = 2 x ______ + 1
Answer:
If you take one away from 209, you get 208. If you halve this number, you get 104. So
209 = 2 x 104 + 1
which is the same as "double 104 plus one".
The number 104 is an even number, since it is divisible by 2.
In this worksheet, we will learn how to express an odd number as "double a number plus one" and then identify whether the result is an odd or even number.
For Example:
Question:
Write this odd number as "double a number plus one". Then say whether your answer is odd or even.
209 = 2 x ______ + 1
Answer:
If you take one away from 209, you get 208. If you halve this number, you get 104. So
209 = 2 x 104 + 1
which is the same as "double 104 plus one".
The number 104 is an even number, since it is divisible by 2.
Question
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