Question

7. Află termenul necunoscut:
a) a + 140 600
215 +n 304
b) 800 - a=398
a - 127 = 425
c) m + 75 = 900
389 + r = 720
d) n - 425 = 97
535 - r = 287​

Answer 1

Răspuns:

a)a +140 =600

a=600-140

a=460

215+n=304

n=304-215

n= 89

b) 800-a =398

800-394 = 206

a-127 =425

a=425+127

a=552

c) m+75=900

m=900-75

m= 825

389+r =720

r=720-389

r= 331

d) n-425=997

n=997+425

n= 1522

535-r =287

r=535-287

r= 248