Mr. Martini's Classroom
Mr. Martini's Classroom: Adding 2 Digit Numbers Showing the 1 Carry
Students add two-digit numbers with these interactive flashcards. The resource demonstrates how to carry a "1" in the tens or hundreds column.
Khan Academy
Khan Academy: Add 2 and 3 Digit Numbers (No Regrouping)
Practice solving problems like 243 + 452. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: Peyton and Presley Discuss Addition
The purpose of this task is to support students in developing an understanding of a place value strategy for adding numbers. By using a representation to visualize the abstract notation, students will make sense of the strategy, adding...
CK-12 Foundation
Ck 12: Elem Math: Adding Decimals From the Thousandths Place to the Tens Place
[Free Registration/Login may be required to access all resource tools.] This mathematics resource is a video demonstrating addition with decimals to the thousandths place, followed by practice problems adding numbers with digits in the...
ClassFlow
Class Flow: Making a Ten Adding Two Digit Numbers
[Free Registration/Login Required] This flipchart introduces the concept of addition of sums of 10 or more than 10. The flipchart has examples with visuals to help students understand tens and ones. It would be useful when beginning a...
National Council of Teachers of Mathematics
Nctm: Illuminations: Grouping and Grazing
A game that reviews grouping in fives and tens, and adding and subtracting. The instuctions are clear and include a video of how to play.
Khan Academy
Khan Academy: Add 1s or 10s (No Regrouping)
Practice solving problems like 34+5 and 34+50. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.