enVision Math, 5th Grade Topic 5 Practice Test

Front

What is the process to estimate division using compatible numbers?

Back

To estimate division using compatible numbers, round the numbers to the nearest values that are easy to divide. For example, for 487 ÷ 67, you can round 487 to 490 and 67 to 70, making it easier to calculate 490 ÷ 70.

Front

How do you find the number of items in each group when dividing a total?

Back

To find the number of items in each group when dividing a total, divide the total number of items by the number of items per group. For example, 1,242 law enforcement officers divided into groups of 18 gives approximately 60 officers per group.

Front

What information is needed to calculate the total consumption of a resource over time?

Back

To calculate the total consumption of a resource over time, you need to know the rate of consumption per unit of time and the total time. For example, to find out how many insects a bat can eat in a day, you need to know how many hours it spends eating each day.

Front

How do you calculate the time needed to save for a specific amount?

Back

To calculate the time needed to save for a specific amount, divide the total amount needed by the amount saved per time period. For example, to buy an item costing $384 by saving $30 each week, it will take 13 weeks.

Front

What is the formula to find the number of boxes needed for a total quantity of items?

Back

The formula to find the number of boxes needed is: Total items ÷ Items per box. For example, for 384 note pads with 48 in each box, you would calculate 384 ÷ 48 = 8 boxes.

Front

What does it mean to round numbers for estimation?

Back

Rounding numbers for estimation means adjusting the numbers to the nearest ten, hundred, or other place value to make calculations easier and quicker.

Front

What is a compatible number in division?

Back

A compatible number in division is a number that is easy to work with and can simplify the division process, often by being a multiple of the divisor.

Front

How can you check if your division estimate is reasonable?

Back

You can check if your division estimate is reasonable by performing the actual division and comparing the result to your estimate.

Front

What is the significance of understanding units of measurement in word problems?

Back

Understanding units of measurement in word problems is crucial because it helps to correctly interpret the problem and apply the right calculations.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations; knowing one can help you solve the other. For example, if you know that 6 x 4 = 24, you can also say that 24 ÷ 4 = 6.