a fost răspuns

calculeaza termenul necunoscut:  prima: 450+22-a=141?   a doua:  925-312+a=989?   a treia:  879-234-a=411?   a patra:   a+(523+132)=889?   a cincea  a+(679-226)=758?   a șasea:  a-(225+101)=311?   a șaptea:  a-(467-232)=244? va rog plz  va rog zicetimi

Răspuns :

Ciosid
450+22-a=141
450+22-141=a
331=a
a=331

925-312+a=989
a=989-925+312
a=376

879-234-a=411
879-234-411=a
234=a
a=234

a+(523+132)=889
a+655=889
a=889-655
a=234


a+(679-226)=758
a+453=758
a=758-453
a=305

a-(225+101)=311
a-326=311
a=311+362
a=673

a-(467-232)=244
a-235=244
a=244+235
a=479
1.450+22-a=141,472+a=141,a=472-141,a=331
2.925-321+a=989,604+a=989,a=989-604,a=385
3.879-234-a=411,645-a=411,a=645-411,a=234
4.a+(523+132)=889,a+655=889,a=889-655,a=234
5.a+(679-226)=758,a+453=758,a=758-453,a=305
6.a-(225+101)=311,a-326=311,a=637
7.a-(467-232)=244,a-235=244,a=244+235,a=479
PROBA:
ex.450+22-331=141

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