Question

a model train has an engine and six boxcars. The engine is 12 cm long and each boxcar is 7 cm long. there is a 1 cm space between cars. how long is the train?

Answer 1

7 spaces total
7 × 1cm = 7cm

6 box cars
6 × 7cm = 42cm

1 engine
1 × 12cm = 12cm

7cm + 42cm + 12 cm = 61cm

The train is 61cm long.