Addition and subtraction

Advanced Math 4 · Unit 2 · multi-digit-add-sub · Teacher edition

multi-digit-add-sub

Name ______________________________Date ______________

1.
Compute $6{,}004 - 1{,}357$ .
Answer: ______________
2.
A bakery sold $9{,}400$ buns on Saturday and Sunday together. It sold $1{,}800$ more buns on Saturday than on Sunday. How many buns did it sell on Sunday?
Answer: ______________
3.
Mia and Liam have $4{,}000$ stickers altogether. Mia has $2{,}350$ of them. How many more stickers does Mia have than Liam?
1. (A)
  $700$
2. (B)
  $1{,}650$
3. (C)
  $800$
4. (D)
  $5{,}650$

Answer key — Addition and subtraction

1.
4647multi-digit-add-sub-01
Regroup $6{,}004$ as $5{,}000 + 900 + 90 + 14$ . Then $14 - 7 = 7$ , $9 - 5 = 4$ , $9 - 3 = 6$ , $5 - 1 = 4$ , giving $\mathbf{4{,}647}$ . Check: $4{,}647 + 1{,}357 = 6{,}004$ .
2.
3800multi-digit-add-sub-02
Remove the extra $1{,}800$ from the total: $9{,}400 - 1{,}800 = 7{,}600$ . That is two equal shares, so Sunday $= 7{,}600 \div 2 = \mathbf{3{,}800}$ . Saturday is $3{,}800 + 1{,}800 = 5{,}600$ , and $5{,}600 + 3{,}800 = 9{,}400$ .
3.
(A)
$700$
multi-digit-add-sub-03
Liam has $4{,}000 - 2{,}350 = 1{,}650$ stickers. The difference is $2{,}350 - 1{,}650 = \mathbf{700}$ . ( $1{,}650$ is Liam's amount, not the difference; $800$ is a regrouping slip; $5{,}650$ adds instead of comparing.)