Question

30 mm
60 mm
50 mm
30 mm​

Answer 1

Answer:

150 mm

Step-by-step explanation:

30 mm  + 60 mm +  50 mm + 30 mm​

= 90mm + 80 mm

=150 mm

hope it helps u

MARK AS BRAINLIEST

Answer 2

Answer:

170mm

Step-by-step explanation:

first trick

30mm + 60mm + 50mm + 30mm

= 30 mm + 60mm

= 90mm

= 90mm + 50mm

= 140mm

= 140mm + 30mm

= 170mm

second trick

30mm+ 60mm+ 50mm+ 30mm

= 90mm+ 80mm

= 170mm