Multiplying Four Digits By Single-Digit Numbers

Description

Building on their work in Topic B, students begin in Topic C decomposing numbers into base ten units in order to find products of single-digit by multi-digit numbers. Students use the distributive property and multiply using place value disks to model. Practice with place value disks is used for two-, three-, and four-digit by one-digit multiplication problems with recordings as partial products. Students bridge partial products to the recording of multiplication via the standard algorithm.1 Finally, the partial products method, the standard algorithm, and the area model are compared and connected by the distributive property (4.NBT.5).