From facts to borrowing
- Within 10 and 20. Subtraction facts, like 13 – 5, a whole sheet at a time.
- Two digits, no regrouping. Every top digit is big enough: subtract the ones, then the tens.
- Two digits with regrouping. When the top ones digit is smaller, take one ten and make ten more ones.
- Three digits. The same steps across tens and hundreds.
Check by adding
Every subtraction has an addition hiding in it: if 72 – 38 = 34, then 34 + 38 = 72. Children who check their answers this way catch their own mistakes and learn how the two operations fit together. The addition worksheetsuse the same levels.
Common Core standards
- 1.OA.C.6Add and subtract within 20.
- 2.OA.B.2Add and subtract within 20 fluently, knowing the facts from memory.
- 2.NBT.B.5Add and subtract within 100 fluently, using place value.
- 2.NBT.B.7Add and subtract within 1000, regrouping tens and hundreds when needed.
- 3.NBT.A.2Add and subtract within 1000 fluently.
Summaries in our own words; see the Common Core State Standards for the full text.
