b) 7m 3dm = 7m + $\frac{3}{10}$dm= $7\frac{3}{10}$m
c) 8dm 9cm= 8dm + $\frac{9}{10}$dm= $8\frac{9}{10}$dm
d) 12cm 5mm= 12cm + $\frac{5}{10}$mm= $12\frac{5}{10}$mm
b) 7m 3dm = 7m + $\frac{3}{10}$dm= $7\frac{3}{10}$m
c) 8dm 9cm= 8dm + $\frac{9}{10}$dm= $8\frac{9}{10}$dm
d) 12cm 5mm= 12cm + $\frac{5}{10}$mm= $12\frac{5}{10}$mm