CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Numbers Up to 20 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve word problems using both addition and subtraction. The video is followed by additional practice problems.
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
Illustrative Mathematics
Illustrative Mathematics: 2.nbt Saving Money 1
In this lesson plan students use strategies based on place value to add and subtract within 100.
ClassFlow
Class Flow: Puzzles & Starters 1234 Puzzle
[Free Registration/Login Required] Using the numbers 1, 2, 3, and 4, students use appropriate order of operations to find as many equations from 1-100 as possible.
Khan Academy
Khan Academy: Adding Two Digit Numbers by Making Tens
In this exercise, students practice adding two-digit numbers by making tens. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Subtracting Two Digit Numbers (No Regrouping)
In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.
Khan Academy
Khan Academy: Skip Count by 10s
Practice counting by 10s. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Skip Count by 5s
Practice counting by 5s. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Skip Counting by 100s
Practice counting by 100s. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.