1. Lessons
  2. Grade 1
  3. Math
  4. Addition and Subtraction 20-100

Math Lesson - Mental Math -Subtract and Add by 10, Grade 1

  • Activity 1 / Mental Math: Subtracting and Adding by 10

  • Activity 2 / Snowball Math Worksheet

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    This super fun snowball fight is one kids can have no matter the weather and they'll be working on their math facts while they do so. Using tens to add and subtract is a useful strategy to build automaticity in math addition and subtraction equations. With this cheery and free PDF worksheet, they'll count on or count back by 10 in order to solve addition and subtraction problems, and to select the correct answers. And these snowballs don't even let them get cold when they're working!

    Download Worksheet Complete online

  • Activity 3 / Rocket Math Worksheet

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    Watch your little mathematicians take off into outer space as they use this fantastic and fun PDF worksheet to practice adding and subtracting. They'll skip count on or back by 10, and they'll work on strengthening using 10 as a strategy when solving equations for better authenticity. The rockets are brightly colored and engaging and they'll take your students and turn them into math whizzes in no time!

    Download Worksheet Complete online

  • Activity 4 / Stolen Cheese Case Maze Worksheet

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    Uh-oh! Someone stole the cheese and it's up to your mathematician to help figure out who it was! Was it the guilty-looking dog, the indifferent-looking cat or the obvious suspect mouse? Your student will get to be the detective on the case as he or she skip counts by 10 using traceable lines on this free PDF worksheet to track down the culprit. They'll work on using skip-counting by 10 as a strategy, and they'll have fun solving the important case!

    Download Worksheet Complete online

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