................................
6m2 85 dm2+13m2 15 dm2=68500 cm2 +<span>131500 cm2 =
</span><span>200000 cm2 = 2000 dm<span>2=20 m2
</span></span><span>18 m2 -2 m2 34 dm2 = </span><span>180000 cm2 -23400 cm2=156600 cm2=<span>15 m2 66 dm2</span></span>
<span>
</span>