Răspuns :
|+||=35
|×4=||
__________
(|×4)+|=35
2×|×4=35/÷4
2×|=8,375 sau 8 r 3
|=8,375÷2
|=2,1875
||=2×2,1875=4,375
|×4=||
__________
(|×4)+|=35
2×|×4=35/÷4
2×|=8,375 sau 8 r 3
|=8,375÷2
|=2,1875
||=2×2,1875=4,375