4th Grade Adding and Subtracting Multi-Digit Numbers Worksheet Solutions (PDF)

4th Grade math worksheet solutions: Adding and Subtracting Multi-Digit Numbers – Maths PDF

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This add subtract answers for 4th Grade covers adding and subtracting multi-digit numbers (Common Core 4.NBT.B.4), with a free PDF to print.

Check your work with this answer key. Each solution goes place by place from the ones, shows every carry and regroup, and finishes with a check using the opposite operation. The final answer is in bold.

Grade 4 · Common Core State Standards: 4.NBT.B.4

Add subtract answers: exercises 1 to 10

Exercise 1 – Add four digits

Ones: $7 + 1 = 8$. Tens: $2 + 6 = 8$. Hundreds: $3 + 5 = 8$. Thousands: $4 + 2 = 6$.

$6,888$

Exercise 2 – Subtract four digits

Ones: $5 – 2 = 3$. Tens: $4 – 1 = 3$. Hundreds: $8 – 5 = 3$. Thousands: $6 – 3 = 3$.

$3,333$

Exercise 3 – Add with carrying

Carry 1 into the tens, hundreds, and thousands.

Ones: $8 + 5 = 13$, write 3, carry 1. Tens: $7 + 6 + 1 = 14$, write 4, carry 1. Hundreds: $4 + 9 + 1 = 14$, write 4, carry 1. Thousands: $3 + 2 + 1 = 6$.

$6,443$

Exercise 4 – Subtract with regrouping

The ones digit 3 is smaller than 6, and the tens digit is 0, so regroup from the hundreds. 8,203 is 7 thousands, 11 hundreds, 9 tens, and 13 ones.

Ones: $13 – 6 = 7$. Tens: $9 – 1 = 8$. Hundreds: $11 – 7 = 4$. Thousands: $7 – 4 = 3$.

$3,487$

Exercise 5 – Add five digits

Ones: $9 + 8 = 17$, write 7, carry 1. Tens: $8 + 3 + 1 = 12$, write 2, carry 1. Hundreds: $6 + 4 + 1 = 11$, write 1, carry 1. Thousands: $5 + 7 + 1 = 13$, write 3, carry 1. Ten thousands: $4 + 2 + 1 = 7$.

$73,127$

Exercise 6 – Subtract five digits

Ones: $6 – 4 = 2$. Tens: 0 is less than 7, so regroup from the hundreds: $10 – 7 = 3$. Hundreds: now 1 hundred, less than 5, so regroup from the thousands: $11 – 5 = 6$. Thousands: now 0, less than 8, so regroup from the ten thousands: $10 – 8 = 2$. Ten thousands: $6 – 3 = 3$.

Check: $32{,}632 + 38{,}574 = 71{,}206$.

$32,632$

Exercise 7 – Subtract from 6,000

6,000 becomes 5 thousands, 9 hundreds, 9 tens, and 10 ones.

Ones: $10 – 7 = 3$. Tens: $9 – 8 = 1$. Hundreds: $9 – 4 = 5$. Thousands: $5 – 2 = 3$.

Check: $3{,}513 + 2{,}487 = 6{,}000$.

$3,513$

Exercise 8 – Zeros in the middle

Regroup across the zeros: 50,004 is 4 ten thousands, 9 thousands, 9 hundreds, 9 tens, and 14 ones.

Ones: $14 – 6 = 8$. Tens: $9 – 7 = 2$. Hundreds: $9 – 3 = 6$. Thousands: $9 – 9 = 0$. Ten thousands: $4 – 1 = 3$.

$30,628$

Exercise 9 – Add six digits

Ones: $1 + 6 = 7$. Tens: $8 + 9 = 17$, write 7, carry 1. Hundreds: $4 + 3 + 1 = 8$. Thousands: $2 + 8 = 10$, write 0, carry 1. Ten thousands: $7 + 5 + 1 = 13$, write 3, carry 1. Hundred thousands: $3 + 4 + 1 = 8$.

$830,877$

Exercise 10 – Subtract from 800,000

800,000 is 7 hundred thousands, 9 ten thousands, 9 thousands, 9 hundreds, 9 tens, and 10 ones.

Ones: $10 – 5 = 5$. Tens: $9 – 2 = 7$. Hundreds: $9 – 9 = 0$. Thousands: $9 – 6 = 3$. Ten thousands: $9 – 4 = 5$. Hundred thousands: $7 – 3 = 4$.

Check: $453{,}075 + 346{,}925 = 800{,}000$.

$453,075$

Exercises 11 and up

Exercise 11 – Add three numbers

First add two numbers: $12{,}345 + 6{,}789 = 19{,}134$.

Then add the third: $19{,}134 + 24{,}680 = 43{,}814$.

$43,814$

Exercise 12 – Check with addition

The parts add back to the total.

Add the answer to the number subtracted: $4{,}227 + 4{,}879$. Ones: $7 + 9 = 16$. Tens: $2 + 7 + 1 = 10$. Hundreds: $2 + 8 + 1 = 11$. Thousands: $4 + 4 + 1 = 9$.

The sum is $9,106$, the starting number, so Ethan is correct.

$4{,}227 + 4{,}879 = 9{,}106$; correct

Exercise 13 – Missing addend

Subtract: $9{,}000 – 5{,}248$. Regroup 9,000 as 8 thousands, 9 hundreds, 9 tens, and 10 ones.

Ones: $10 – 8 = 2$. Tens: $9 – 4 = 5$. Hundreds: $9 – 2 = 7$. Thousands: $8 – 5 = 3$.

Check: $5{,}248 + 3{,}752 = 9{,}000$.

$3,752$

Exercise 14 – Find the mistake

In every place he subtracted the smaller digit from the larger digit. In the ones place he did $7 – 5 = 2$ instead of regrouping to get $15 – 7 = 8$.

Correct: 6,205 is 5 thousands, 11 hundreds, 9 tens, and 15 ones. Ones: $15 – 7 = 8$. Tens: $9 – 3 = 6$. Hundreds: $11 – 8 = 3$. Thousands: $5 – 2 = 3$.

Check: $3{,}368 + 2{,}837 = 6{,}205$.

$3,368$

Exercise 15 – Two-day crowd

Ones: $8 + 2 = 10$. Tens: $5 + 7 + 1 = 13$. Hundreds: $4 + 6 + 1 = 11$. Thousands: $2 + 5 + 1 = 8$. Ten thousands: $1 + 1 = 2$.

$28,130$ fans

Exercise 16 – Notebook sale

$2{,}000 – 1{,}386$. Regroup 2,000 as 1 thousand, 9 hundreds, 9 tens, and 10 ones.

Ones: $10 – 6 = 4$. Tens: $9 – 8 = 1$. Hundreds: $9 – 3 = 6$. Thousands: $1 – 1 = 0$.

Check: $614 + 1{,}386 = 2{,}000$.

614 notebooks

Exercise 17 – Miles left

$2{,}850 – 1{,}967$. Ones: 0 is less than 7, so regroup a ten. Tens: 4 left, which is less than 6, so regroup a hundred. Hundreds: 7 left, which is less than 9, so regroup a thousand.

Now the digits are 1 thousand, 17 hundreds, 14 tens, and 10 ones.

Ones: $10 – 7 = 3$. Tens: $14 – 6 = 8$. Hundreds: $17 – 9 = 8$. Thousands: $1 – 1 = 0$.

Check: $883 + 1{,}967 = 2{,}850$.

883 miles

Exercise 18 – Farmers market weeks

First two weeks: $4{,}285 + 3{,}968 = 8{,}253$.

Add the third week: $8{,}253 + 5{,}047 = 13{,}300$.

$\$13,300.00$

Exercise 19 – Library books

Add: $36{,}500 + 8{,}275 = 44{,}775$.

Subtract: $44{,}775 – 2{,}968 = 41{,}807$.

Check: $41{,}807 + 2{,}968 = 44{,}775$.

$41,807$ books

Exercise 20 – Town growth

$163,909$ rounds to $164,000$. $148,326$ rounds to $148,000$. Estimate: $164{,}000 – 148{,}000 = 16{,}000$.

Exact: $163{,}909 – 148{,}326 = 15{,}583$.

The exact answer is close to the estimate, so it is reasonable.

$15,583$ more people

Key facts behind this add subtract answers

Key facts

Always line up the digits by place value before you add or subtract.
Start at the ones place and work to the left.
Carry 1 to the next place when a column sum is 10 or more.
Regroup 1 from the next place when the top digit is smaller; a 0 becomes 9 after regrouping across it.
Check subtraction by adding, and check addition by subtracting.

How to use this add subtract answers

Cover each solution, solve the exercise again, then uncover it and compare every line. If your answer differs, find the first step that changed and redo the exercise from there.

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