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Andreea678
a fost răspuns

Sa se efectueze:

a) 7 supra 6 - (1 supra 4 + 1 supra 3 - 1 supra 2)
b) 2 3 supra 5 - (3 1 supra 10 - 2 1 supra 2 + 1)

Dau coroana

Răspuns :

a)1/4+1/3=3/12+4/12=7/12
2)7/12-1/2=7/12-6/12=1/12.
3)7/6-1/12=14/12-1/12=13/12.

b)3*10+1=31/8-5/2=31/8-20/8=11/8.
2)11/8+1=12/8.
3)13/5-12/8=104/40-60/40=44/40.
Cu drag!