Students summarize their invented strategies for adding sums to 10 by solving a variety of problems (join, take away, compare). Students then make the connections between addition and subtraction and find the facts in the related fact family. This unit also marks the start of the systematic practice and assessment of the addition facts with sums to 10.
| EXPECTATIONS | |
|---|---|
| Use this list of expectations to assess students on the key concepts and skills in this unit. | |
| E1* | Name the partitions of 10. |
| E2 | Represent addition and subtraction using stories, drawings, diagrams, counters, number sentences, number lines, or ten frames. |
| E3 | Find the related subtraction sentence for an addition sentence (e.g., fact families). |
| E4 | Use strategies that apply the properties of addition (e.g., turn-around, zero) to solve addition and subtraction problems. |
| E5 | Find the unknown whole number in an addition or subtraction equation relating three whole numbers. |
| E6 | Solve word problems (e.g., join, separate/take away, part-whole, compare) involving two whole numbers whose sum is less than or equal to 10. |
| E7 | Add and subtract within 10 using invented, counting (e.g., counting on, counting up, counting back), and reasoning (e.g., making ten, using ten, using doubles) strategies. |
| E8* | Use mental math strategies to add (e.g., direct modeling, counting strategies, reasoning from known facts) for the facts in Groups A and B. |
| * Denotes Benchmark Expectation | |