Number and operations

3.4(G)

Multiply Two-Digit Numbers Three Ways

Use strategies and algorithms, including the standard algorithm, to multiply a two-digit number by a one-digit number. Strategies may include mental math, partial products, and the commutative, associative, and distributive properties.

Part of The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve problems with efficiency and accuracy

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Intro

Multiplying Two-Digit Numbers

Today you will learn to multiply a two-digit number by a one-digit number. You will use partial products, mental math, and the standard algorithm. Imagine a pecan farm in Texas with 3 rows of trees. Each row has 24 trees. How many trees are there? That is 3 x 24.