Week 18~Thursday

Front

How do you calculate the cost per item when given a total cost and quantity?

Back

To find the cost per item, divide the total cost by the number of items. For example, if 3 sandwiches cost $5, the cost per sandwich is $5 ÷ 3 = $1.67.

Front

What is an inequality and how is it used in real-life situations?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is greater than, less than, or equal to the other. It is used to represent situations where there are limits or thresholds, such as earnings or budgets.

Front

How do you calculate the percentage of a part compared to a whole?

Back

To find the percentage, divide the part by the whole and multiply by 100. For example, if Eddie has read 173 pages out of 480, the percentage read is (173 ÷ 480) × 100 = 36%.

Front

What is the formula to find the total budget if a percentage of it is known?

Back

If you know the amount that represents a percentage of the budget, you can find the total budget by dividing that amount by the percentage (in decimal form). For example, if $800 is 16% of the budget, the total budget is $800 ÷ 0.16 = $5,000.

Front

How do you determine the number of defective items based on a percentage?

Back

To find the number of defective items, multiply the total number of items by the percentage of defects (in decimal form). For example, if 550 toys are produced and 6% are defective, the number of defective toys is 550 × 0.06 = 33.

Front

What does it mean to solve an inequality?

Back

Solving an inequality means finding the values of the variable that make the inequality true. This often involves isolating the variable on one side of the inequality.

Front

What is the significance of the 'at least' phrase in inequalities?

Back

The phrase 'at least' indicates that the value must be greater than or equal to a certain number, which is represented by the '≥' symbol in inequalities.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100. For example, 1/3 = (1 ÷ 3) × 100 = 33.33%.

Front

What is the relationship between total cost, unit cost, and quantity?

Back

The total cost is equal to the unit cost multiplied by the quantity. This can be expressed as Total Cost = Unit Cost × Quantity.

Front

How do you express a percentage as a decimal?

Back

To express a percentage as a decimal, divide the percentage by 100. For example, 25% as a decimal is 25 ÷ 100 = 0.25.