Mastering Place Value and Operations

What is 35 + 40 using place value?

• A) 65

• B) 75

• C) 85

• D) 95

Answer explanation

To find the sum of 35 and 40 using place value, add the digits in each place value column. The sum of the ones place is 5 + 0 = 5. The sum of the tens place is 3 + 4 = 7. Therefore, the answer is 75, which corresponds to choice B.

Subtract 28 from 63 using place value.

• A) 35

• B) 45

• C) 25

• D) 55

Answer explanation

To subtract 28 from 63 using place value, subtract the ones place: 3 - 8 = -5. Then subtract the tens place: 6 - 2 = 4. The correct answer is 35 (A) because -5 in the ones place is carried over to the tens place, resulting in 4. Therefore, 63 - 28 = 35.

Using the commutative property, what is another way to write 47 + 26?

• A) 26 + 47

• B) 47 - 26

• C) 26 - 47

• D) 73 + 0

Answer explanation

Using the commutative property, the addition can be written as 26 + 47, which is the correct choice A.

If you subtract 32 from 89, what is the difference?

• A) 57

• B) 47

• C) 67

• D) 77

Answer explanation

The correct answer is A) 57. Subtracting 32 from 89 gives us a difference of 57.

What is the sum of 53 and 24 using place value?

• A) 77

• B) 67

• C) 87

• D) 97

Answer explanation

The sum of 53 and 24 using place value is 77. Choice A is the correct answer.

What is the result of subtracting 49 from 92 using place value?

• A) 43

• B) 53

• C) 63

• D) 73

Answer explanation

Subtracting 49 from 92 using place value gives the result of 43. This is the correct choice, as option A) is the only answer that matches the result.

Using the associative property, which of the following is equal to (15 + 25) + 35?

• A) 15 + (25 + 35)

• B) 15 + (35 - 25)

• C) (35 + 15) - 25

• D) 25 + (15 + 35)

Answer explanation

Using the associative property, we can rearrange the parentheses. Therefore, (15 + 25) + 35 is equal to 15 + (25 + 35). Thus, the correct choice is A) 15 + (25 + 35).

What is the missing number in the following equation: 76 - ___ = 34?

• A) 42

• B) 52

• C) 40

• D) 32

Answer explanation

The missing number in the equation 76 - ___ = 34 is 42. This is the correct choice because when we subtract 42 from 76, we get 34.

If you add 58 and 19 using place value, what is the sum?

• A) 67

• B) 77

• C) 87

• D) 97

Answer explanation

By adding 58 and 19 using place value, the correct sum is 77 (choice B).

What is the result of 80 - 46 using place value?

• A) 34

• B) 44

• C) 36

• D) 54

Answer explanation

The correct answer is A) 34. Subtract the ones place: 0 - 6 = -6. Borrow 1 from the tens place. Subtract the tens place: 7 - 4 = 3. The result is 34.