Unit 2 Review

Front

What is a 6-digit number and how is it structured?

Back

A 6-digit number consists of six digits, where each digit has a place value based on its position. For example, in the number 584,221, the digit 5 is in the hundred-thousands place, 8 in the ten-thousands place, 4 in the thousands place, and so on.

Front

How do you determine the value of a digit in a number?

Back

The value of a digit in a number is determined by its place value. For example, in the number 584,221, the digit 4 is worth 4,000 because it is in the thousands place.

Front

What is the process for estimating a multiplication problem?

Back

To estimate a multiplication problem, round the numbers to the nearest ten, hundred, or other convenient value, then multiply the rounded numbers. For example, to estimate 549 * 7, round 549 to 500 and multiply: 500 * 7 = 3,500.

Front

How do you solve a division problem involving whole numbers?

Back

To solve a division problem, divide the dividend (the number being divided) by the divisor (the number you are dividing by) to find the quotient. For example, 52 ÷ 15 gives the number of boxes needed to transport jars of honey.

Front

What is a number model and how is it used in word problems?

Back

A number model is a mathematical expression that represents a real-world situation. It helps to visualize and solve problems. For example, in the honey problem, the number model is 52 ÷ 15 = b, where b represents the number of boxes.

Front

What is the significance of place value in multi-digit numbers?

Back

Place value is significant because it determines the value of each digit in a multi-digit number. Each position represents a power of ten, which affects the overall value of the number.

Front

How do you convert feet to inches?

Back

To convert feet to inches, multiply the number of feet by 12, since there are 12 inches in a foot. For example, to convert 19 feet to inches, calculate 19 * 12.

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What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations. If you multiply a number by another, you can find the original number by dividing the product by that number.

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How do you interpret a word problem to create a mathematical expression?

Back

To interpret a word problem, identify the key information and relationships described, then translate that information into a mathematical expression or equation that represents the situation.

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What does it mean for a number to be 'short of' another number?

Back

When a number is described as 'short of' another number, it means that it is less than that number by a certain amount. For example, if the length around a garden is 7 inches short of 19 feet, it means the length is 19 feet - 7 inches.