1. a)64:8=8
48:6=8
b)51:3=17
3
21
21
==
72:4=18
4
32
32
==
c)6×6:9=36:9=4
88:8×5=11×5=55
2. a) (48-35)×3+63:9-8:2
=13×3+4-4=39
b)5×5×3+5-5×3+5+3×5+5=25×3+5-15+5+15+5
=75+5-15+5+15+5=90
c) (64:4:4+81:3:3+72:2:2+4:1:1):5
=(16:4+27:3+36:2+4):5
=(4+9+18+4):5
=35:5=7
3. a) a : 8 = 12
a=12×8
a=96
b) 7 × b = 84
b=84:7
b=12
c) 90 : 5 : c = 6
18 : c = 6
c=18:6
c=3
4. a) (54:3)×2=18×2=36
b) 8×12-32:4=96-8=88
c) (63:3+75:5):2=(21+15):2=36:2=18
5. a) d-deimpartit
i-impartitor
d=99
i=9
d:i=99:9=11
b)d=8+6=14
i=7
d:i=14:7=2
c)d=2×36=72
i=36:4=9
d:i=72:9=8
6. 87-15=72
72:6=12 lei o cutie cu acuarele
7. C+V+A=75
C=75:3
C=25 timbre
A=75-36
A=39 timbre
C+A=25+39=64 timbre
V=75-64
V=11 timbre
Verificare:25+39+11=75 timbre
>ALEXA<
SPOR LA TEME !
