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I. Operaţii de acelaşi ordin
a) 210 - 63 + 4 - 81 + 5 = (R: 75)
600 - 132 + 6 + 59 - 4= (R:529)
436 + 78 - 10 - 193 + 12 = (R: 323)
157 + 48 - 6- 47 + 20 = (R: 172)
501 - 240 - 100 - 20 + 5 = (R: 146)​


Răspuns :

Răspuns:

210 - 63 + 4 - 81 + 5 =

147+4-81+5=

151-81+5=

70+5=75

600 - 132 + 6 + 59 - 4=

468+6+59-4=

474+59-4=

533-4=529

436 + 78 - 10 - 193 + 12 =

514-10-194+12=

504-195+12=

309+12=323

157 + 48 - 6- 47 + 20 =

305-6-47+20=

199-47+20=

152+20=172

501 - 240 - 100 - 20 + 5 =

261-100-20+5=

161-20+5=

141+5=146