Răspuns :
1 a) 6+7 = 13
b) 6x7 = 42
c) 6-7 = -1
2) 2x10 + (34:4) - ( 18:2 ) = 20 + 17 - 9 = 28
3) 4 saptamani = 7x4 = 28 zile
2 x 28 + 3 = 56 + 3 = 59
4) 1 kg = 2 jumatati
3 kg = 6 jumatati
10 kg = 20 jumatati
20 kg = 40 jumatati
cpl ,
b) 6x7 = 42
c) 6-7 = -1
2) 2x10 + (34:4) - ( 18:2 ) = 20 + 17 - 9 = 28
3) 4 saptamani = 7x4 = 28 zile
2 x 28 + 3 = 56 + 3 = 59
4) 1 kg = 2 jumatati
3 kg = 6 jumatati
10 kg = 20 jumatati
20 kg = 40 jumatati
cpl ,
A) 6+7=13
6x7=42
7-6=1
B)
10x2=20
36:4=9
20+9=29
18:2=9
20-9=20
C)
7x4=28
28+3=31
D)
1:2=0,5
3:2=1,5
10:2=5
20:2=10