Question

afla numerele necunoscute : a +560 = 780 , b+ 2 340 = 5 687 , c - 2 315 = 1 324 , d - 345 = 1 300 , 4 500 + e = 6 800 , 325 +f =330 , 6 500 - g = 2 300 , 8 794 - h 4 326 ?

Answer 1

a +560 = 780
a=780-560
a=220

 b+ 2 340 = 5 687
b=5687-2340
b=3347

 c - 2 315 = 1 324
c=1324+2315
c=3639

 d - 345 = 1 300
d=1300+345
d=1645

4 500 + e = 6 800 
e=6800-4500
e=2300

 325 +f =330 
f=330-325
f=5

 6 500 - g = 2 300 
g=6500-2300
g=4200

 8 794 - h =4 326
h=8794-4326
h=4468