Two and Three Digit by One Digit Multiplication
This lesson covers two and three digit by one digit multiplication. I have four videos for this skill because there are four different methods for solving these problems. I prefer the area model because it reinforces mental math and place value and prepares them for two digit by two digit multiplication. It also ties into their previous multiplication knowledge from third grade. The standardized tests focus on partial products. Both partial products and the distributive method help students understand math (the "why") behind the standard algorithm. The standard algorithm is the "traditional method" for solving. I have added practice pages and word problems for this skill with an answer key at the very bottom of the page.
Area ModelDistributive Method |
Partial ProductsStandard Algorithm |
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Practice Problems
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Sample Word Problems:
1. Julia has $57. Charlene has 7 times as much money as Julia. How much money does Charlene have?
2. Shiza has half as much money as Andrew. Stacy has 5 times as much money as Andrew. If Andrew has $446, how much money do Shiza and Stacy each have?
3. At the flower shop, there are 8 times as many roses as sunflowers. If there are 178 sunflowers, how many roses are there?
4. Each school bus can hold 45 people. The fourth and fifth grade are taking 9 buses to the fair. How many people can ride on the buses to the fair?
5. Farmer Ed was filling baskets with tomatoes. Each basket contained 6 tomatoes. If there were 83 baskets of tomatoes, how many tomatoes were there in all?
1. Julia has $57. Charlene has 7 times as much money as Julia. How much money does Charlene have?
2. Shiza has half as much money as Andrew. Stacy has 5 times as much money as Andrew. If Andrew has $446, how much money do Shiza and Stacy each have?
3. At the flower shop, there are 8 times as many roses as sunflowers. If there are 178 sunflowers, how many roses are there?
4. Each school bus can hold 45 people. The fourth and fifth grade are taking 9 buses to the fair. How many people can ride on the buses to the fair?
5. Farmer Ed was filling baskets with tomatoes. Each basket contained 6 tomatoes. If there were 83 baskets of tomatoes, how many tomatoes were there in all?
Check Your Work!
| answerkeytwoandthreebyonemultiplication.doc |
