Even and Odd Numbers
Define a "pair"
A set of two
4
2 + 2
This place value is on the right side. Each digit is worth one.
ones place
This number form is how numbers are usually shown, like on our number line.
Standard form
How many tens and how many ones are in 21?
2 tens and 1 one.
This kind of number can be shown as pairs, with none left over.
Even numbers
11
6 + 5
This place value is on the left side. Each digit is worth ten.
This number form breaks down numbers to show their place value, using a plus sign.
Expanded form
Write 49 in expanded form.
40 + 9
odd
What does a near doubles fact show?
Odd numbers can be split into equal groups with ONE LEFT OVER
What is the value of the digit 2 in the number 42?
2
This number form uses words to show numbers.
Word form
Write 30 + 4 in standard form.
34
List all even numbers, up to 20
2, 4, 6, 8, 10, 12, 14, 16, 18, 20
18
9 + 9
What is the value of the digit 8, in the number 87?
80
Show 34 in a different way.
show answers
Write this number in word form: ninety-three
93
List all odd numbers, up to 20.
1, 3, 5, 7, 9, 11, 13, 15, 17, 19.
What does a doubles fact show?
Even numbers can be split into EQUAL groups.
Draw the number 75 in base ten blocks.
Show answer
Show 79 in a different way
show answers
Ms. McGehee has an odd number of pencils and an even number of markers. Choose all groups of pencils and markers that could belong to Ms. McGehee.
A. 3 pencils and 6 markers
B. 9 pencils and 4 markers
C. 10 pencils and 5 markers
D. 7 pencils and 8 markers