Subtraction practice

Subtract feet and fractional inches

Subtract length measurements written in feet and fractional inches, including teacher-selected fractional precision.

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Align feet with feet and inches with inches. Exchange one foot for 12 inches when the upper inch amount is too small.

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Learning objective

What this activity builds

Regroup one foot as twelve inches and subtract common fractions of an inch accurately.

Worked example

What is 8 ft 3 1/4 in − 3 ft 7 3/4 in?

4 ft 7 1/2 in

Regroup to 7 ft 15 1/4 in. Then 15 1/4 − 7 3/4 = 7 1/2 inches and 7 − 3 = 4 feet.

Teaching notes

Make the practice count

  • Convert fractions to a common denominator before subtracting.
  • Use a ruler model to show why adding 12 inches preserves the original length.

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Configured PDF · Feet and inches subtraction · US Letter

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Math SheetNameScore/ 15TeacherDateFeet and inches subtractionSubtract feet and fractional inches exactly.1.7 ft 5 in- 6 ft 8 in2.6 ft 9 5/8 in- 0 ft 3 3/4 in3.13 ft 4 3/4 in- 4 ft 5 9/16 in4.9 ft 0 1/4 in- 6 ft 9 1/4 in5.5 ft 6 1/2 in- 0 ft 5 in6.10 ft 3 in- 0 ft 10 1/2 in7.10 ft 2 1/2 in- 3 ft 5 in8.14 ft 7 in- 7 ft 0 1/2 in9.7 ft 2 1/4 in- 2 ft 1 in10.3 ft 10 1/2 in- 1 ft 2 1/2 in11.7 ft 6 3/4 in- 1 ft 6 in12.8 ft 1 1/2 in- 0 ft 6 in13.12 ft 2 in- 2 ft 0 1/2 in14.10 ft 0 5/8 in- 6 ft 10 1/2 in15.17 ft 3 5/8 in- 8 ft 0 1/2 inmath-sheet.comPage 1 / 1

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