200+300×2=1000cm. 60+40×2=200cm.

Question

200+300×2=1000cm.
60+40×2=200cm.

Answer 1

(200+300)×2=1000см
(60+40)×2=200см

Answer 2

200+300=500
500x2=1000
60+40=100
100x2=200