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a×6=654

a=654:6

a=109

b:8=124

b=124×8

b=992

5×c=400

c=400:5

c=80

3×44+X=200

132+x=200

x=200-132

x=68

624:d=8

d=624:8

d=78

e×3=987

e=987:3

e=329

f:2=377

f=377×2

f=754

462:7+y=500

66+y=500

y=500-66

y=434

6×g=594

g=594:6

g=99

h:5=79

h=79×5

h=395

996:i=4

i=996:4

i=249

z-25×7=725

z-175=725

z=725+175

z=900

Răspuns:

1)ax6=654

a=654:6

a=109

v:109×6=654

2)624:d=8

d=624:8

d=78

v:624:78=8

3)6×g=594

g=594:6

g=99

v:6×99=594

4)b:8=124

b=124×8

b=992

v:992:8=124

5)e×3=987

e=987:3

e=329

v:329×3=987

6)h:5=79

h=79×5

h=395

v:395:5=79

7)5×c=400

c=400:5

c=80

v:5×80=400

8)f:2=377

f=377×2

f=754

v:754:2=377

9)996:i=4

i=996:4

i=249

v:996:249=4

10)3×44+x=200

132+×=200

x=200-132

×=68

v:3×44+68=132+68=200

11)462:7+y=500

66+y=500

y=500-66

y=434

v:462:7+434=66+434=500

12)z- 25x7=725

z-175=725

z=725+175

z=900

v:900-25×7=900-175=725