Gradeless

Tens and Ones

Add and take away two-digit numbers. Start with whole tens, then work up to carrying and borrowing.

Adding & Subtracting Big Numbers · Grades 1–4 · 7 levels · Free

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7 levels

  1. Whole tens
  2. Add a ten, take a ten
  3. Adding, no carrying
  4. Taking away, no borrowing
  5. Carrying
  6. Borrowing
  7. Mixed, timed

What it practises

  • Place Value (Tens)
  • Double-Digit Addition
  • Double-Digit Subtraction

More Adding & Subtracting Big Numbers lessons

Gradeless is free: short math and learning lessons for kids in kindergarten to grade 5, each one starting where your child is. For grown-ups