Răspuns :
Răspuns:
4.
a)142+104+228=246+228=474
b)133+305+247=438+247=685
c)685-474=211
5.
- 462
- 690
- 481
- 863
- 492
- 742
- 491
6.
a)243-120=123
b)243+228+120=471+120=591
Răspuns:
Ex 4
a) 142+104+228=474
b) 133+305+247=485
c) 485-474=11
Ex 5
426+36=462
482+208=690
376+105=481
735+128=863
263+229=492
529+213=742
268+223=491
Ex 6
a) 243-120=123
243+120+228=591