Number (add/sub)
Hong Kong
Stage 1
Add and subtract four digit numbers I
Lesson
Remember how you learned a variety of ways to add and subtract 3 digit numbers? You can use these same methods to add and subtract 4 digit (and even larger) numbers, too. Watch the videos below to see what this looks like.
Add 4 digit numbers
Remember!
- You can add in any order.
- Be sure to add numbers of the same place value.
- If a place value has a sum larger than 9, regroup and carry over to the next place value (Go to the lesson on regrouping to see more).
Subtract 4 digit numbers
Remember!
- In subtraction, order matters. Subtract the second number from the first.
- Subtract numbers of the same place value.
- If you see a smaller number being subtracted from a larger one, regroup and borrow from a larger place value. (Go to the lesson on regrouping to see more).
Worked Examples
Question 1
Find the value of $2652+5116$2652+5116.
Question 2
Find the value of $5599-1187$5599−1187.
Question 3
Ivan is saving up for a new grand piano, which will cost $\$6898$$6898.
If he currently has $\$2575$$2575 saved up, how much more money does Ivan need to purchase the grand piano?