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 = 13Example: 13 - 7 = 6 and (13 - 3) - 4 = 6 (using the knowledge that 3 + 4 = 7)
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Virtual Manipulatives
Student Resources
Virtual Manipulatives
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.
Type: Virtual Manipulative
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.
Type: Virtual Manipulative
Parent Resources
Virtual Manipulative
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.
Type: Virtual Manipulative