Question

Afla nr necunoscut:
45:a×100=900
25×4:b=20
824-240:c=800
245+50×h=745

Answer 1

1)45:a x 100=900
45:a=900:100
45:a=9
a=45:9
a=5
2)25 x 4:b=20
100:b=20
b=100:20=5
b=5
3)824-240:c=800
840-800=240:c
40=240:c
240:c=40
c=240:40=6
3)245+50 x h=745
50 x h=745-245
50 x h=500
h=500:50=10
h=10

Answer 2

45:a•100=900 45:a=900:100 45:a=9 a=45:9=5 25•4:b=20 4:b=25•20=500 b=500:4=150 824-240:c=800 240:c=824-824=24 c=240:24 c=10 245+50•H=745 50•h=745-245=500 h=500:50=10