Multiplication is essentially repeated addition, or growing numbers by doubling, tripling, quadrupling, and so on. This unit presents mental models and strategies that help students learn and review the concept of multiplication. Students explore multiplication using arrays, partial products, doubling methods and the standard algorithm to solve numerical and word problems. Students will multiply whole numbers and simple decimals by base ten exponents (i.e. .3 x 103).
When Olympic swimmer Michael Phelps won a race by .01 of a second, we saw how significant a hundredth of a second can be! This series offers practice with decimals to build a solid understanding of the place value system.
Encourage students to explain the relationship between decimals and fractions to help them with future computations. Use this lesson on its own or as support to the lesson Area with Decimals and Fractions.
Refresh students on the relationship between decimals and fractions when they multiply to find the area! They will find the area of a location in a picture by converting mixed numbers to a decimals and then using the area equation.
It’s the beginning of the school year and your class needs supplies! Can your students successfully shop for everything they need and stay on budget? Find out in this real-world application of multiplying whole numbers by decimals.
This holiday season, use the worksheet, Holiday Shopping: Decimal Practice 2, to help your fifth-graders add, subtract, and multiply decimals. These real-world skills will be helpful as they plan their own gift-giving this holiday.