Question

7dm2cm +4dm8cm= ... dm

Answer 1

7dm2cm=72cm

4dm8cm=48cm

ta có: 72+48=120(cm)

120cm=12dm

Answer 2

7dm2cm=72cm

4dm8cm=48cm

72 + 48 = 120

120 = 12 dm

Answer 3

7dm 2cm = 72m                        ;       4dm 8cm = 48cm

72 + 48 = 120cm                      :       120cm = 12dm

7dm 2cm + 4dm 8cm = 12dm