Question

Afla termenul necunoscut : a+202:2=800,b-12×27=925:5,1 000-c=325×4+28:7,820-d×3=22×10 Va rog, dau coroana!

Answer 1

Răspuns:

a + 202 : 2 = 800

a + 101 = 800

a = 800 - 101

a = 699

b - 12 x 27 = 925 : 5

b - 324 = 185

b = 185 + 324

b = 509

1000 - c = 325 x 4 + 28 : 7

1000 - c = 1300 + 4

1000 - c = 1304

c = 1000  - 1304

c = - 304

820 - d x 3 = 22 x 10

820 - 3d = 220

3d = 820 - 220

3d = 600

d = 600 : 3

d = 200

Answer 2

Explicație pas cu pas:

a+202:2=800

a+101=800

a=800-101

a=699

v:699+202:2=699+101=800

b-12×27=925:5

b-324=185

b=185+324

b=509

v:509-12×27=925:5

509-324=

185=185

1 000-c=325×4+28:7

1 000-c=1 300+4

1 000-c=1 304

c=1000-1 304

c=-304

v:1000-(-304)=325×4+28:7

= 1 300+4

1304 = 1 304

820-d×3=22×10

820-dx3=220

d×3=820-220

d×3=600

d=600:3

d=200

v:820-200×3=22×10

820-600=

220=220