Add Tens

Add multiples of 10 to two-digit numbers.

2nd Grade - Math - Add within 100

About This Skill

Adding tens is one of the most useful mental math strategies a Grade 2 student can practice. By focusing on the tens digit, students combine multiples of 10 with two-digit numbers quickly and accurately. This practice builds calculation speed, strengthens number sense, and prepares students to master multi-step word problems.

Skills & Topics

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

Curriculum Alignment

  • 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.NBT.5
  • 2.NBT.B.5: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
  • 2.NBT.B.5
  • MA.2.NSO.2.3
  • MATH.2.4.B
  • BC.MATH.G2.CONTENT.04
  • AB.MATH.G2.MAT2-OI1-GQ2-LO1
  • ZA.CAPS.MATH.G2.NOR.1.16
  • G2.B2.3
  • SG.MATH.P2.NA.WN.2.2

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