6.7 cm + 33.9 cm = ____ mm

 $20\frac{1}{5}$ cm + 7.6 cm = ____cm

81.4 cm + 65 cm = ___mm

 $11\frac{1}{8}$ km + 45.7 km = ___ km

 $\frac{3}{5}$ kg + 760 g = ___ g

 $12\frac{1}{2}$ kg + 4.8 kg + 370 g = ___ kg

80 g + $6\frac{1}{4}$ kg + 9 kg = ___ g 

Add the mass, in g, for pineapple and papaya.

Calculate the total mass, in g, for all three packets of the wafer as shown in the pictures.

3.8 litre + 9.204 litre =___ litre

 $2\frac{3}{4}$ litre+ 7.265 litre = ___ litre

 $\frac{9}{10}$ litre + 12 304 millilitres=___litre

 $3\frac{1}{5}$ litre + 680 millilitre + 0.2 litre =  litre

8 litres 645 millilitres + $12\frac{1}{2}$ litres + 4.1 litres = ___ litres