Question

Determină valoarea numărului necunoscut:
a) 32 : a = 5 rest 2
50 : a =7 rest 1
26 : a = 8 rest 2
84 : a = 9 rest 3
b) 75 : a = 8 rest 3
39 : a = 7 rest 4
30 : a = 4 rest 2
29 : a = 9 rest 2
c) a : 4 = 5 rest 2
a : 2 = 9 rest 1
a : 6 = 7 rest 5
a : 5 = 8 rest 1
d) a : 3 = 7 rest 1
a : 8 = 9 rest 5
a : 7 = 8 rest 3
a : 4 =3 rest 2
Va dau Coroana ​

Answer 1

Răspuns:

a)

32:a=5 rest 2

a=(32-2)x5

a=30:5

a=6

50:a=7 rest 1

a=(50-1):7

a=49:7

a=7

26:a=8rest 2

a=(26-2):8

a=24:8

a=3

84:a=9 rest 3

a=(84-3):9

a=81:9

a=9

b)

75:a=8 rest 3

a=(75-3):8

a=72:8

a=9

39:a=7 rest 4

a=(39-4):7

a=35:7

a=5

30:a=4 rest 2

a=(30-2):4

a=28:4

a= 7

29:a=9 rest 2

a=(29-2):9

a=27:9

a=3

c)

a:4=5 rest 2

a=5x4+2

a=20+2

a=22

a:2=9 rest 1

a=9x2+1

a=18+1

a=19

a:6=7 rest 5

a=7x6+5

a=42+5

a=47

a:5=8 rest 1

a=8x5+1

a= 40+1

a=41

d)

a:3=7 rest 1

a=7x3+1

a=21+1

a=22

a:8=9 rest 5

a=9x8+5

a=72+5

a=77

a:7=8 rest 3

a=8x7+3

a=56+3

a=59

a:4=3 rest 2

a=3x4+2

a=12+2

a=14