Lessons for 2.NBT.B.5
Adding two-digit numbers without regroupingTens add to tens and ones add to ones with no bundling needed.Lesson
Counting up to find a differenceStarting at the smaller number and adding on until the larger one is reached.Lesson
Fact familiesOne trio of numbers gives two addition sentences and two subtraction sentences.Lesson
Multi-digit additionAdd by place value, regrouping when a column passes nine.Lesson
Multi-digit subtractionSubtract by place value, regrouping when a column runs short.Lesson
Regrouping in additionTen ones become one ten so that no place ever holds more than nine.Lesson
Regrouping in subtractionOne ten is broken into ten ones when a place does not have enough.Lesson
The standard subtraction algorithmSubtracting column by column from the right, unbundling where needed.Lesson
Subtracting two-digit numbers without regroupingEach place has enough to take from, so nothing is unbundled.Lesson
Printable Worksheets
Adding two-digit numbers without regrouping worksheet (PDF)Printable worksheet with answer keyPreview
Counting up to find a difference worksheet (PDF)Printable worksheet with answer keyPreview
Fact families worksheet (PDF)Printable worksheet with answer keyPreview
Regrouping in addition worksheet (PDF)Printable worksheet with answer keyPreview
Regrouping in subtraction worksheet (PDF)Printable worksheet with answer keyPreview
The standard subtraction algorithm worksheet (PDF)Printable worksheet with answer keyPreview
Subtracting two-digit numbers without regrouping worksheet (PDF)Printable worksheet with answer keyPreview