Question

c. Inlocuiți literele cu numerele potrivite astfel ca egalitățile date să fie adevărate: a x 6 = 48
a×9=90
7×a=35
8×a=24
54:b=6
36:b=6
b:1=9
b:1=7
3×c×10=30
c×5×2=50
9×7×c=0
c×5×4=20​

Answer 1

Răspuns:

a×9=90

a=90:9

a=10

7xa=35

a=35:7

a=5

8×a=24

a=24:3

a=8

54:b=6

b=54:6

a=9

36:b=6

b=36:6

b=6

b:1=9

b=9x1

b=9

b:1=7

b=7x1

b=7

3×c×10=30

c=30:10:3

c=3:3

c=1

c×5×2=50

cx10=50

c=50:10

c=5

9×7×c=0

63xc=0

c=0:63

c=0

c×5×4=20

cx20=20

c=20:20

c=1

Answer 2

a•9=90

a=90:9

a=10

7•a=35

a=35:7

a=5

8•a=24

a=24:8

a=3

54:b=6

b=54:6

b=9

36:b=6

b=36:6

b=6

b:1=9

b=1:9

b=9

b:1=7

b=7•1

b=7

3•c•10=30

3•c=30:10

3•c=3

c=3:3

c=1

c•5•2=50

c•5=50:2

c•5=25

c=25:5

c=5

c•5•4=20

c•5=20:4

c•5=5

c=5:5

c=1

Cu plăcere!!!