А)306
<span>70024
</span><span>6000000
</span><span>5.08дм2
</span><span>0.709м2
</span><span>3.06м2
</span><span>8.2дм2
</span><span>100.08дм2
</span><span>5.0025м2
</span>б)<span>513
</span><span>40009
</span><span>3000000</span>
А+б=7
Р=2(а+б)
2×7=14 (см) - периметр прямоугольника
3,274 = 3,27; 11,958 = 11,96; 9,097 = 9,1