Thực hiện phép tính: a) 3m40cm + 4m24cm – 5m69cm

d) 98m20cm x 2 + 23m30cm × 2

= 2 × (9820cm + 2330cm)

= 2 × 12150 cm

= 24300 cm

e) 18m 40cm × 4 + 80m5dm × 8

= 18m 40cm × 4 + 80m5dm × 4 × 2

= 18m 40cm × 4 + 16100cm × 4

= 4 × (1840cm + 16100cm)

= 4 ×17940cm

= 71760cm

f) 87m 23dm : 2

= 8930cm : 2

= 4465cm

g) 9m 8dm 7cm : 3

= 987cm : 3

= 329cm

a) 3m40cm + 4m24cm – 5m69cm

= 7m64cm - 5m69cm

= 764cm - 569cm

= 195cm

b) 72m6cm – 56m 50cm + 7m 44cm

= 7206cm - 5650cm + 744cm

= 1556cm + 744cm

= 2300cm

c) 8m 27dm + 3m 35cm + 3dm 65cm

= 8270cm + 335cm + 95cm

= 8605cm + 95cm

= 8700cm

h) 90dm 30cm : 10

= 930cm : 10

= 93cm

i) 19dm 8cm : 3

= 198cm : 3

= 66cm

j) 36m 8dm 7cm : 3

= 3687cm : 3

= 1229cm