bonjour,
12-12:2=12-(10:2)=12-5=7
30:5x2=(30:5)x2=6x2=12
2x6x5=(2x6)x5=12x5=60
40-20:10x5=40-(20:10)x5=40-(2x5)=40-10=30
(19-7x2)+4=(19-(7x2))+4=(19-14)+4=5+4=9
50-(13+1)-21=50-(14)-21=(50-14)-21=36-21=15
n1=1
n2=3+1=4=2²
n3=5+3+1=9=3²
n4=7+5+3+1=16=4²
n10=19+17+15+13+11+9+7+5+3+1=100=10²
Niveau n=n² cubes
