Efectuați : va rog plissss

Efectuați Va Rog Plissss class=

Răspuns :

1)7-7+(7×8:7)×7-7=7-7+(56:7)×7-7
=7-7+8×7-7
=7-7+56-7
=49
2)[89×(12920-12896)]-1296:12=(89×24)-108
=2136-108
=2028
3)(8+30+6):(90-68)=44:22
=2
4)(11+29)+100=140