Unit 3 Multi-Digit Whole Number Computation

In Unit 3 students wil:

  • Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted.
    • Represent these problems using equations with a letter standing for the unknown quantity. 
    • Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
  •  Fluently add and subtract multi-digit whole numbers using the standard algorithm.
  •  Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

By the end of Unit 3 your child should be able to answer the following questions:

  • What strategies can we use to solve multi-step word problems?
  •  How do we know if answers are reasonable?
  •  What is the meaning of a remainder?

The following videos will explain some of the topics covered in Unit 3.


Adding with the Standard Algorithm

Subtracting With the Standard Algorithm

 Partial Differences

Multiplicative Comparison

Order of Operations

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  • To visit LearnZillion and learn how to  Solve Subtraction Problems Using a Number Line
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