Use counting strategies, number patterns, and models as a means for solving basic addition and subtraction fact problems.
Remarks
Decomposing considered key for understanding the addition and subtraction relationship. Teachers should include one-step word problems.
Strategies include: Doubles, Doubles + 1, Doubles - 1, Grouping 10s, Counting on, and Counting back
Example: 6 + 7 = 13, 6 + 6 + 1 = 13
Example: 13 - 7 = 6 and (13 - 3) - 4 = 6 (using the knowledge that 3 + 4 = 7)
Subject Area: X-Mathematics (former standards - 2008)
Grade: 1
Body of Knowledge: Algebra
Big Idea: BIG IDEA 1 - Develop understandings of addition and subtraction strategies for basic addition facts and related subtraction facts.
Date Adopted or Revised: 09/07
Date of Last Rating: 06/07
Status: State Board Approved - Archived
Related Resources
Lesson Plans
| Name |
Description |
| Dangerous Doubles (Doubling Numbers) | This lesson teaches students to use the strategy doubling numbers and doubles plus or minus one in order to use mental math to add one-digit numbers. The students are engaged in learning through the read-aloud of "Double the Ducks" by Stephen Murphy and then get to work with a partner to draw doubles and write equations that relate to their drawings. Students individually work on solving word problems using these strategies and manipulatives as necessary to solve. |
| Out of Sight Missing Addends | Students will learn how to use manipulatives to solve missing addends in math problems. |
Virtual Manipulatives
| Name |
Description |
| Five Frame | This applet contains four games (How Many?, Build, Fill, and Add) that utilize a frame with five slots for students to place objects, which helps students develop counting and addition skills. |
| Ten Frame | This applet contains four games (How Many?, Build, Fill, and Add) that utilize a frame with ten slots for students to place objects, which helps students develop counting and addition skills. |
Student Resources
Virtual Manipulatives
| Name |
Description |
| Five Frame : | This applet contains four games (How Many?, Build, Fill, and Add) that utilize a frame with five slots for students to place objects, which helps students develop counting and addition skills. |
| Ten Frame: | This applet contains four games (How Many?, Build, Fill, and Add) that utilize a frame with ten slots for students to place objects, which helps students develop counting and addition skills. |
Parent Resources
Virtual Manipulative
| Name |
Description |
| Ten Frame: | This applet contains four games (How Many?, Build, Fill, and Add) that utilize a frame with ten slots for students to place objects, which helps students develop counting and addition skills. |
