Question

Mary buys a reel of thread for sewing. There are 15m of thread on the reel. She uses 510 cm. How much is left on the reel in centimeters?

Answer 1

Mary bought a 15-meter reel of thread and used 510 cm. After converting meters to centimeters and subtracting the used length, she has 990 centimeters of thread remaining.

Step-by-step explanation:

Mary initially bought a reel of thread with 15 meters, which is equal to 1500 centimeters since there are 100 centimeters in a meter. After using 510 centimeters, we have to subtract this amount from the initial length to find out how much is left on the reel in centimeters. The calculation is straightforward:

• Convert meters to centimeters: 15 m x 100 cm/m = 1500 cm.
• Subtract the used length: 1500 cm - 510 cm = 990 cm.

Therefore, Mary has 990 centimeters of thread left on the reel.