Spiral Review Week 18

Front

How do you calculate the cost each person pays for gasoline?

Back

To find out how much each person pays, divide the total cost of gasoline by the number of people. For example, if 12 gallons cost $3.76 each, the total cost is 12 * 3.76 = $45.12. Then, divide $45.12 by 3 (the number of people) to get $15.04.

Front

What does 2.4 ÷ 3 represent?

Back

2.4 ÷ 3 means you are dividing 2.4 into 3 equal parts. Each part is 0.8.

Front

What is the order of operations in the expression 6 [48 – 5(1 + 3)]?

Back

First, calculate inside the parentheses: 1 + 3 = 4. Then, multiply by 5: 5 * 4 = 20. Next, subtract from 48: 48 - 20 = 28. Finally, multiply by 6: 6 * 28 = 168.

Front

How do you compare numbers using inequalities?

Back

To compare numbers, use symbols like < (less than) or > (greater than). For example, if 0.08 is less than 0.097, you write it as 0.08 < 0.097.

Front

What is the formula for the perimeter of a rectangle?

Back

The perimeter (P) of a rectangle is calculated using the formula P = 2(length + width). If the perimeter is 43 feet, you can set up the equation 2(l + w) = 43.

Front

What is the value of x if the width of a rectangle is 9.5 feet and the perimeter is 43 feet?

Back

If the width (w) is 9.5 feet, you can find the length (l) using the perimeter formula: 2(l + 9.5) = 43. Solving gives l = 12 feet.

Front

What does it mean to share costs equally?

Back

Sharing costs equally means dividing the total cost by the number of people involved so that each person pays the same amount.

Front

What is the significance of parentheses in mathematical expressions?

Back

Parentheses indicate which operations should be performed first in an expression, following the order of operations.

Front

How do you find the average of a set of numbers?

Back

To find the average, add all the numbers together and then divide by the total number of values.

Front

What is the relationship between division and fractions?

Back

Division can be expressed as a fraction. For example, 2.4 ÷ 3 can be written as 2.4/3.