CCSS.Math.Content.2.NBT.B.8

Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Subtraction Collection

Activity • Grades K-2

ABCmouse

Addition Collection

Activity • PreK, Grades K-2

ABCmouse

Addition and Subtraction: Word Problems

Lesson Plan • Grades K-2

My Favorite Resources

Number Skip - TENS

Grades K-5

TESiboard

100 square counting in 10's

Handout, Worksheet • Grades K-5

Math_Team

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