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Math Drills

Subtracting Length (Same Units)

B-3

Word Problems

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What this worksheet covers

Worksheet
Subtraction (Same Units)

Subtraction of lengths opens here. Both sides carry the same unit, cm against cm and m against m, so nothing but the sizes has to be weighed. Bare equations stand alongside word problems in which a scene of length being taken away has to be read.

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Setting down an equation without first deciding which of the two lengths is greater turns the subtraction round. Checking that the shorter is being taken from the longer settles it. Writing the equation in the order the figures happen to appear in the text also flips the direction.

The direction has turned, but the stance of getting the units to agree before calculating is inherited from Addition (Same Units). In Subtraction (Different Units) the length being subtracted from carries two units.

  • cm (Word Problems)3 questions
  • m (Word Problems)3 questions
Questions & answers

Problems and answers on this worksheet

These are the problems in “Length (cm, mm, m)”, shown with their answers.

  1. (1)At the birthday party, Hannah got 15cm of red ribbon. If she uses 8cm of it, how many cm will be left? Answer □

    Answer: 7cm

  2. (2)At the store, Grace bought 25cm of yellow tape. If she uses 12cm of it, how many cm will be left? Answer □

    Answer: 13cm

  3. (3)At the park, Ethan picked up 22cm of white rope. If he uses 13cm of it, how many cm will be left? Answer □

    Answer: 9cm

  4. (4)At school, during crafts class, Grace prepared 12m of wire. After using 3m, how many m are left? Answer □

    Answer: 9m

  5. (5)At the park, Riley picked up 7m of white rope. After cutting off 2m, how many m are left? Answer □

    Answer: 5m

  6. (6)At the store, Liam bought 16m of red tape. After cutting off 9m, how many m are left? Answer □

    Answer: 7m

What to do next

Comparing Length and UnitsComparing Length and Units Reading
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Next unit: Capacity (L, dL, mL)
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