Building on experiences from previous grades, students deepen their understanding of place value and expand their ability to add, subtract, and multiply multidigit numbers. Students make connections between base-ten representations and paper-and-pencil methods. They also further develop their mental math strategies. The goal of this unit is to improve students' skills and understanding of concepts so they can choose appropriate methods to solve problems efficiently and accurately.
| EXPECTATIONS | |
|---|---|
| Use this list of Expectations to assess students on the key concepts and skills in this unit. | |
| E1* | Show that different partitions of the same number are equal using base-ten pieces, number lines, and number sentences (e.g., 200 + 30 + 7 = 200 + 20 + 17). |
| E2* | Represent and solve addition problems using base-ten pieces and number lines. |
| E3* | Represent and solve subtraction problems using base-ten pieces and number lines. |
| E4* | Solve addition and subtraction problems using mental math strategies (e.g., composing and decomposing numbers, counting up, and counting back). |
| E5 | Solve multiplication problems using mental math strategies (e.g., composing and decomposing numbers and doubling and halving). |
| E6* | Add multidigit numbers using paper-and-pencil methods (expanded form, all partials, and compact). |
| E7* | Subtract multidigit numbers using paper-and-pencil methods (expanded form and compact). |
| E8 | Multiply 2-digit numbers by 1-digit numbers using paper-and-pencil methods (expanded form, all partials, and compact). |
| E9* | Choose appropriately from among mental math, estimation, and paper-and-pencil methods to add and subtract whole numbers. |
| E10 | Choose appropriately between mental math and paper-and-pencil methods to multiply whole numbers. |
| E11 | Estimate sums and differences. |
| E12* | Demonstrate fluency with the multiplication facts for the 2s, 3s, and 9s. |
| E13* | Determine the unknown number in a multiplication or division sentence relating three whole numbers for the 2s, 3s, and 9s facts. |
| * Denotes Benchmark Expectation | |