Question

Mary buys a reel of thread for sewing. there are 10 m of thread on the real. she uses 210 cm. How much is left on the reel in cm.

Answer 1

length of reel=  10m

=1000cm

leght of tread mary used= 210 cm

thread left= 1000-210 cm

thread left = 790 cm

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Answer 2

Answer:

we know that, 1m=100cm

therefore, 10m=10*100=1000cm

Mary uses 210cm

left over thread= total length of thread-length of used thread

=1000-210

=790 m