Students use flexible strategies and methods for multiplication of multidigit numbers. Students use mental math, rectangle models, expanded form, the all-partials method, and the compact method to multiply two-digit by two-digit numbers. They develop estimation and mental math strategies as a way to check reasonableness of answers or to compute quickly. Students also develop methods to choose appropriately among the strategies.
| EXPECTATIONS | |
|---|---|
| Use this list of Expectations to assess students on the key concepts and skills in this unit. | |
| E1* | Demonstrate understanding of the place value concepts and mathematical properties involved in multiplication of 2-digit by 2-digit numbers (e.g., use the distributive property to multiply). |
| E2* | Show connections between models and strategies for multiplying 2-digit by 2-digit numbers (e.g., demonstrate partial products using a rectangle model for multiplication). |
| E3* | Estimate products of multidigit numbers. |
| E4* | Multiply 2-digit by 2-digit numbers using mental math strategies and paper-and-pencil methods (e.g., expanded form, all-partials). |
| E5 | Multiply 2-digit by 2-digit numbers using the compact method. |
| E6 | Choose appropriately from among estimation, mental math strategies, and paper-and-pencil methods to multiply multidigit numbers. |
| E7* | Demonstrate fluency with the division facts related to the last six multiplication facts (24 ÷ 4, 24 ÷ 6, 28 ÷ 4, 28 ÷ 7, 32 ÷ 4, 32 ÷ 8, 42 ÷ 6, 42 ÷ 7, 48 ÷ 6, 48 ÷ 8, 56 ÷ 7, 56 ÷ 8). |
| E8* | Determine the unknown number in a multiplication or division sentence relating three whole numbers for the last six facts. |
| * Denotes Benchmark Expectation | |