Add Tens

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.

• Number Sense and Operations
• Whole Numbers
• Addition
• Place Value
• Adding
• Addend
• Equations
• 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.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

• Add and Subtract with Facts (up to 20)

• Break Apart Numbers to Add
• Subtract Tens

• Solve Addition and Subtraction Real-World Problems