N=34,22.
M=1,5.
(12,4+8,6)x8,5:2=89,25m2.
3,14x2x2=12,56m2.
89,25-12,56=76,69m2.
10+15=25cm
1000:25=40cm
40x15:2=300cm2
a) ( 9+11,5 ) x 6,2 : 2 = 63,55 cm2.
b) 31,4:3,14=10:2=5x5x3,14=78,5cm2.
a)15,6+32,88=48,48. b)158,08-97,15=60,93. c)15,45x1,6=24,72. d)75:60=1,25.
86503
267354,78345,25653,13469,12904.
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