Mastering Addition and Subtraction

What is 456 + 789?

• 1245

• 1234

• 1456

• 1300

Answer explanation

To find the sum of 456 and 789, simply add the two numbers: 456 + 789 = 1245. Therefore, the correct answer is 1245.

Subtract 234 from 567.

• 333

• 250

• 400

• 300

Answer explanation

To find the result of 567 - 234, subtract 234 from 567. The calculation gives 333, which is the correct answer.

If you have 125 apples and you buy 375 more, how many apples do you have in total?

• 375

• 250

• 450

• 500

Answer explanation

To find the total number of apples, add the apples you have (125) to the apples you bought (375). 125 + 375 = 500. Therefore, the correct answer is 500.

Estimate the sum of 298 and 467.

• 900

• 750

• 800

• 850

Answer explanation

To estimate the sum of 298 and 467, round 298 to 300 and 467 to 500. Adding these gives 300 + 500 = 800. Thus, the estimated sum is closest to 800.

What is the place value of 7 in the number 7,432?

• 7,000

• 70

• 700

• 7000

Answer explanation

In the number 7,432, the digit 7 is in the thousands place. Therefore, its place value is 7,000.

Use a number line to add 34 and 29.

• 39

• 72

• 54

• 63

Answer explanation

To add 34 and 29 on a number line, start at 34 and move 29 units to the right. This brings you to 63, which is the correct answer.

What is 1,234 - 567?

• 6670

• 667

• 1234

• 567

Answer explanation

To solve 1,234 - 567, subtract 567 from 1,234. The calculation gives 667, which is the correct answer. The other options do not result from this subtraction.

If a book costs $15 and you buy 4 books, how much do you spend?

• $75

• $60

• $45

• $30

Answer explanation

To find the total cost, multiply the price of one book ($15) by the number of books (4). So, $15 x 4 = $60. Therefore, you spend $60.

Estimate the difference between 1,200 and 850.

• 500

• 450

• 400

• 300

Answer explanation

To estimate the difference between 1,200 and 850, round 1,200 to 1,200 and 850 to 800. Then, subtract: 1,200 - 800 = 400. Thus, the estimated difference is 400.

What is the sum of 678 and 345?

• 1000

• 1020

• 1100

• 1023

Answer explanation

To find the sum of 678 and 345, add the two numbers: 678 + 345 = 1023. Therefore, the correct answer is 1023.