CIA #3 Math

Multiplication is a mathematical operation where a number is added to itself a certain number of times. For example, 3 multiplied by 4 (3 x 4) means adding 3 four times: 3 + 3 + 3 + 3 = 12.

A quadrilateral is a polygon with four sides and four angles. Examples include squares, rectangles, and trapezoids.

To find the total cost, add the price of each item together. For example, if you buy 2 items for $3 each and 1 item for $2, the total cost is (2 x 3) + 2 = $8.

A fact family is a group of related addition and subtraction or multiplication and division facts that use the same numbers. For example, the numbers 2, 6, and 12 can form the fact family: 2 x 6 = 12, 6 x 2 = 12, 12 ÷ 2 = 6, 12 ÷ 6 = 2.

This equation asks what number multiplied by 8 equals 24. The answer is 3, because 8 x 3 = 24.

The commutative property states that changing the order of the numbers in a multiplication problem does not change the product. For example, 4 x 5 = 20 and 5 x 4 = 20.

The associative property states that when adding three or more numbers, the way in which the numbers are grouped does not change the sum. For example, (2 + 3) + 4 = 9 and 2 + (3 + 4) = 9.

A rectangle is a quadrilateral with opposite sides that are equal in length and four right angles.

Division is a mathematical operation where a number is split into equal parts. For example, 12 ÷ 4 means splitting 12 into 4 equal parts, which equals 3.

A trapezoid is a quadrilateral that has at least one pair of parallel sides.