Question

20.) Află termenul necunoscut:
6 x 4 + a = 72
b - 8 x 6 = 35
6x9 - C= 8 x4
d + 3 x 6 = 81
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Answer 1

6×4+a=72

24+a=72

a=72-24

a=48

b-8×6=35

b-48=35

b=35+48

b=83

6×9-c=8×4

54-c=32

c=54-32

c=22

d+3×6=81

d+18=81

d=81-18

d=63

Answer 2

Explicație pas cu pas:

6×4+a=72

24+a=72

a=72-24

a=48

v:6×4+48=24+48=72

b-8×6=35

b-48=35

b=35+48

b=83

v:83-8×6=83-48=35

6×9-c=8×4

54-c=32

c=54-32

c=22

v:6×9-22=54-22=32

d+3×6=81

d+18=81

d=81-18

d=63

v:63+3×6=63+18=81