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Sagot :

Bonsoir

1) (3/12)/2= 3/12 × 1/2=6/24=3/12=1/4

Faux

2)1 tonne =1000kg=1 000 000 g=1 ×10^6

52 tonnes =5,2 ×10^6

Faux

3) (3x+2)²=3x²+12x+4

9x²+12x+4=3x²+12x+4

9x²=3x²

Faux

4)air triangle (4*6)/2=24/2=12cm

Air rectangle =5*6=35

35*2/5=70/5=14

Faux

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