Identifying Even and Odd Numbers Using Number Patterns

This lesson teaches how to identify even and odd numbers by focusing on the ones place. It explains that even numbers can be added to form even sums and clarifies misconceptions about tens place digits. The lesson provides a step-by-step method to determine if a number is even or odd by checking if the ones digit can be expressed as a doubles fact. Various examples are used to reinforce the concept, emphasizing that the ones place is key in identifying even or odd numbers.

What happens when you add multiple even numbers together?

• The sum is always odd.

• The sum is always even.

• The sum is always zero.

• The sum can be either even or odd.

Why can a number with an odd digit in the tens place still be even?

• Because the tens digit represents groups of 10, which is even.

• Because the ones digit is always more important.

• Because any number with a 1 in the tens place is even.

• Because the tens digit is ignored.

What is the first step in determining if a number is even or odd?

• Check if the number is prime.

• Check the ones place.

• Check the hundreds place.

• Check the tens place.

If a number in the ones place can be expressed as a doubles fact, what does that indicate?

• The number is prime.

• The number is even.

• The number is odd.

• The number is a multiple of ten.

Which of the following numbers is odd?

• 56

• 83

• 72

• 98

What makes the number 45 odd?

• Both digits are odd.

• The number is less than 50.

• The tens digit is odd.

• The ones digit is odd.

Why is the number 30 considered even?

• Because it is a multiple of 5.

• Because it is a multiple of 3.

• Because it can be divided into equal groups of tens.

• Because it ends in a zero.