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.

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$55991187.

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?