4th Grade Unit 2 Math Review

Front

What is the relationship between total distance driven and distance driven on specific days?

Back

The total distance driven is often a multiple of the distance driven on specific days. For example, if someone drives a total of 72 miles in a week, and this is 8 times the distance driven on Tuesday and Wednesday combined, then the distance driven on those days can be found by dividing the total distance by 8.

Front

How do you calculate the total pages read by someone who reads multiple times more than another person?

Back

To find the total pages read by someone who reads multiple times more than another person, multiply the number of pages the first person read by the multiplier. For example, if Mark read 19 pages and Kiara read 6 times as many, then Kiara read 19 × 6 = 114 pages.

Front

What is the formula to find out how much free time is earned based on homework completed?

Back

The formula to find out how much free time is earned is: (Number of pages completed / Pages per time unit) × Time earned per unit. For example, if Jackie earns 10 minutes for every 3 pages, and she completed 24 pages, she earned (24 / 3) × 10 = 80 minutes.

Front

How do you determine the amount spent by each person when given a relationship between their spending?

Back

To determine the amount spent by each person, set up equations based on the relationships given. For example, if Jax spent $21, which is 3 times what Lionel spent, then Lionel spent $21 / 3 = $7. If Makenzie spent 3 times what Jax spent, she spent $21 × 3 = $63.

Front

What is the process to find the number of items in each category when given a total and number of categories?

Back

To find the number of items in each category, divide the total number of items by the number of categories. For example, if there are 3,820 shirts ordered in 5 sizes, then each size has 3,820 / 5 = 764 shirts.

Front

What does it mean for one quantity to be a multiple of another?

Back

A quantity is a multiple of another if it can be expressed as that quantity multiplied by an integer. For example, if a person drives 72 miles, and this is 8 times the miles driven on certain days, then the miles driven on those days is a multiple of 8.

Front

How can you express a relationship using a number sentence?

Back

A relationship can be expressed using a number sentence by using mathematical operations to show how quantities relate to each other. For example, if Kiara read 6 times as many pages as Mark, the number sentence would be 6 × 19 = □.

Front

What is the significance of identifying the 'not true' statement in a set of options?

Back

Identifying the 'not true' statement helps in understanding the correct relationships and calculations involved. It encourages critical thinking and reinforces the correct application of mathematical principles.

Front

How do you calculate the total time earned based on a ratio of work completed?

Back

To calculate the total time earned based on a ratio of work completed, use the formula: (Total work completed / Work per time unit) × Time earned per unit. This helps in understanding proportional relationships.

Front

What is the importance of understanding ratios in real-life situations?

Back

Understanding ratios is important in real-life situations as it helps in comparing quantities and making informed decisions based on relationships between different items.