Question

Am si eu exercitiile urmatoare, va rog mult sa ma ajutati: b:6×6:3×3=8+8+9:9+13, 113+(113×8)=2000-y+y:y, (h:5-5)×9+186:6=400:10, 6×(5+4)-o+10=29-7:7, 33:(r+19)=80:2:5:4:2

Answer 1

b:6×6:3×3=8+8+9:9+13
b:6×6:3×3=16+1+13
b:6×6:3×3=30
b=30:3×3:6×6   → metoda mersului invers
b=5×6
b=30  

 113+(113×8)=2000-y+y:y
113+904 =2 000 - y +1
2 000 -y +1=1 017
2 000 -y =1017 -1
2 000 - y =1016
y= 2 000 - 1 016
y =984

 (h:5-5)×9+186:6=400:10
(h:5-5)×9+31=40
(h:5-5)×9=40-31
h:5-5=9:9
h:5=1+5
h:5=6
h=6×5
h=30

 6×(5+4)-o+10=29-7:7
6×9-o+10=29-1
54-o+10=28
54-o=28-10
54-o=18
o=54-18
o=36

 33:(r+19)=80:2:5:4:2
33:(r+19)=1
r+19=33:1
r=33-19
r=14

Answer 2

b:6×6:3×3=8+8+9:9+13
b:6×6:3×3=8+8+1+13
b:6×6:3×3=30  |:3
b:6×6:3=10   |×3 
b:6×6=30   |:6
b:6=5   |×6 
b=30 

113+(113×8)=2000-y+y:y 
113+904=2000-y+1
1017=2001-y 
y=2001-1017
y=984 

(h:5-5)×9+186:6=400:10 
(h:5-5)×9+31=40   |-31
(h:5-5)×9=9   |:9 
h:5-5=1   |+5 
h:5=6   |×5 
h=30 

6×(5+4)-o+10=29-7:7
6×9-o+10=29-1
54-o+10=28   |-10
54-o=18
o=54-18
0=36

 33:(r+19)=80:2:5:4:2
 33:(r+19)=40:5:4:2
 33:(r+19)=8::4:2
 33:(r+19)=2:2
 33:(r+19)=1
 r+19=33:1
 r+19=33
r=33-19
r=14