Question

a+146:2-208=148
b-521+104:3=296
c:5+309-248=359
Cu metoda mersului invers si cu verificare

Answer 1

a+73 - 208 = 148
a - 135 = 148
a = 283
v:
283 + 73 - 208 = 148
75 + 73 = 148
148 = 148

b - 521 + 104÷3 = 296
b - 521 + 34,67 = 296
b - 486,33 = 296
b = 782,33
v:
782,33 - 521 + 34,67 = 296
261,33 + 34,67 = 296
296 = 296

c÷5 + 304 - 248 = 359
c÷5 + 56 = 359
c÷5 = 303
c = 1515
v:
1515÷5 + 304 - 248 = 359
303 + 304 - 248 = 359
607 - 248 = 359
359 = 359

Answer 2

a+146:2-208=148
a+73-208=148
a+73=208+148
a+73=356
a=356-73
a=283

Probă :
283+146:2-208=
283+73-208=
356-208=148


b-521+105:3=296
b-521+35=296
b-521=296-35
b-521=261
b=521+261
b=782

Probă :
782-521+105:3=
782-521+35=
261+35=296


c:5+309-248=359
c:5+309=248+359
c:5+309=607
c:5=607-309
c:5=298
c=298×5
c=1490

Probă :
1490:5+309-248=
298+309-248=
607-248=359