Răspuns:
1) 55 : 5 <> (20 +25) : 5 = 20 : 5 + 25 : 5 <> 4+5 =9
2) 39 : 3 <> (21 + 18) : 3 = 21 : 3 + 18 : 3 <> 7 + 6 = 13
3) 28 : 2 <> (14 +14) :2 = 14 :2 + 14 : 2 =<> 7 + 7 = 14
4) 45 :3 <> (21 + 24 ) : 3 = 21 :3 + 24 :3 = <> 7 + 8 = 15
5) 96 :3 <> (48 + 48) : 3 = 48 :3 + 48:3 = <> 16+16 =32
6) 86 :2 <> (42 + 46 ) :2 = 42 :2 + 44 :2 = <> 21 +22 =43
7) 54 :3 <> (27 + 27 ) : 3 = 27 :3 +27 :3 =<> 9+9 = 18
8) 88 :8 <> (40+ 48 ) : = 40 :8 +48 :8 =<> 6+5=11
Pentru I
Pentru II
a)
1) 45 <> 5
2) 32 <> 8
b)
1) 7 <> 42 <> 35
2) 27 <> 63 <> 27
Pentru III
a)
1)Semnul : <> + <> : = + <> :
2) Semnul : <> - <> : = - <> :
b)
1) Semnul : <> + <> : = + <> :
2) Semnul : <> - <> : = - <> :
