Add Tens and Ones Using a Number Line

In this skill, Grade 2 students practice adding 2-digit numbers by breaking them into tens and ones. Using a number line, they start at one addend and make "jumps" for the tens and ones of the second addend to arrive at the sum. With adaptive questions and instant feedback, this practice reinforces place value concepts and builds flexible mental math strategies.

• Number Sense and Operations
• Whole Numbers
• Addition
• Place Value
• Adding
• Addend
• Equations
• Number Line
• 2-Digit Numbers
• Sum
• Add
• Digit

• AC9M2N04 — add and subtract one- and two-digit numbers, representing problems using number sentences and solve using part-part-whole reasoning and a variety of calculation strategies
• ENG-MATH-Y2-AS.5 — Add and subtract numbers using concrete objects, pictorial representations, and mentally, including a two-digit number and 10s.
• NY-2.MD.6
• 2.MD.B.6 — Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
• 2.MD.B.6
• MA.2.NSO.2.3
• MATH.2.4.B
• G2.B2.4
• BC.MATH.G2.CONTENT.04
• AB.MATH.G2.MAT2-OI1-GQ2-LO1
• ZA.CAPS.MATH.G2.NOR.1.16
• SG.MATH.P2.NA.WN.2.2