Students will learn how to use the add and subtract multi-digit whole numbers using the standard algorithms for addition and subtraction respectively. An application of the standard algorithm for subtraction, is being able to find how long someone lived. Here's an example problem. Students will also solve missing number problems involving the addition or subtraction of multi-digit whole numbers. Here are some sample problems.

Using place value to add 3-digit numbers: part 2 by Khan Academy

Do these Khan Academy exercises:

Next, give your students these challenges:

- Making Longer, Making Shorter by NRICH
- The Animals' Sports Day by NRICH

Conclude by leading this investigation:

Zome – geometric construction

by MathPickle

4.NBT.B.4: Fluently add and subtract multi-digit whole numbers using the standard algorithm.