Topic D and E Review

Front

What is subtraction?

Back

Subtraction is taking away a number from another number. For example, in 73 - 18, we take 18 away from 73.

Front

What is the result of 73 - 18?

Back

The result is 55.

Front

What is addition?

Back

Addition is putting together two or more numbers to find a total. For example, 25 + 15 means we add 25 and 15 together.

Front

What is the missing number in the equation 25 + 15 = ? + 12?

Back

The missing number is 28.

Front

What is an even number?

Back

An even number is a number that can be divided by 2 without a remainder. Examples: 2, 4, 6.

Front

What is an odd number?

Back

An odd number is a number that cannot be divided by 2 evenly. Examples: 1, 3, 5.

Front

How can you tell if a number of items is even?

Back

If you can pair them up without any left over, the number is even.

Front

How can you tell if a number of items is odd?

Back

If there is one item left over after pairing them up, the number is odd.

Front

What does it mean if 90 - 20 = 70 - 10 is false?

Back

It means that the two sides of the equation do not equal each other.

Front

What is the result of 90 - 20?

Back

The result is 70.