Lessons for 1.OA.C.6
Adding and subtracting within 20Fluent facts, using ten as a landmark.Lesson
Adding within five and tenTotals up to ten.Lesson
Counting up to find a differenceStarting at the smaller number and adding on until the larger one is reached.Lesson
Counting on to add and counting back to subtractStarting at the larger part and counting forward by the smaller one.Lesson
Doubles and near doublesThe sums in which both parts are the same number.Lesson
Fact familiesOne trio of numbers gives two addition sentences and two subtraction sentences.Lesson
Making ten and bridging through tenMoving part of one addend across to fill a ten before adding the rest.Lesson
The standard subtraction algorithmSubtracting column by column from the right, unbundling where needed.Lesson
Subtracting within tenTaking away from ten or less.Lesson
Printable Worksheets
Adding within five and ten worksheet (PDF)Printable worksheet with answer keyPreview
Counting up to find a difference worksheet (PDF)Printable worksheet with answer keyPreview
Counting on to add and counting back to subtract worksheet (PDF)Printable worksheet with answer keyPreview
Doubles and near doubles worksheet (PDF)Printable worksheet with answer keyPreview
Fact families worksheet (PDF)Printable worksheet with answer keyPreview
Making ten and bridging through ten worksheet (PDF)Printable worksheet with answer keyPreview
The standard subtraction algorithm worksheet (PDF)Printable worksheet with answer keyPreview
Subtracting within ten worksheet (PDF)Printable worksheet with answer keyPreview