General
General
Easy

Question

Mary buys a reel of thread for sewing. There are 10 meters of thread on the real. She uses 210 cm. The length of thread left on the reel is ________ centimeters.

  1. 790 cm    
  2. 1000 cm    
  3. 210 cm    
  4. Can’t define    

Hint:

Step 1:Convert the meter into centimeter
1m = 100cm
Step 2:Subtract the thread on reel used by Mary from the complete reel of thread.

The correct answer is: 790 cm


    Total length of thread which Mary buys = 10m
    1m = 100cm
    10m = 1000cm
    She uses 210 cm, Then remaining thread = 1000cm – 210cm
    = 790cm

    The alternative method is, convert the centimeter into meter and subtracting.

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