Grade 3 Multi-Digit Addition and Subtraction Practice Test

Correct answer: A

The correct answer is 368.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add the ones, tens, and hundreds: 3 + 5 ones make 8 ones, 2 + 4 tens make 6 tens, and 1 + 2 hundreds make 3 hundreds.
3. Check the result: The correct answer is 368.

Correct answer: B

The correct answer is 346.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add by place value: 214 + 132 = 346.
3. Check the result: The correct answer is 346.

Correct answer: C

The correct answer is 429.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add the hundreds, tens, and ones: 305 + 124 = 429.
3. Check the result: The correct answer is 429.

Correct answer: D

The correct answer is 599.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 421 and 178 by place value, regrouping when needed, to get 599.
3. Check the result: The correct answer is 599.

Correct answer: A

The correct answer is 599.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 356 and 243: 300 + 200, 50 + 40, and 6 + 3 give 599.
3. Check the result: The correct answer is 599.

Correct answer: B

The correct answer is 589.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 407 and 182 by place value to get 589.
3. Check the result: The correct answer is 589.

Correct answer: C

The correct answer is 748.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 512 and 236: the sum is 748.
3. Check the result: The correct answer is 748.

Correct answer: D

The correct answer is 799.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 641 and 158, regrouping the ones when needed, to get 799.
3. Check the result: The correct answer is 799.

Correct answer: A

The correct answer is 565.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 225 and 340 by place value to get 565.
3. Check the result: The correct answer is 565.

Correct answer: B

The correct answer is 855.

1. Read the place-value problem: Line up the ones, tens, and hundreds, then identify whether the problem asks for addition or subtraction.
2. Calculate and regroup when needed: Add 730 and 125: 730 + 100 + 25 = 855.
3. Check the result: The correct answer is 855.