operații cu fracții ordinare:1.a)3 supra 10 +7 supra 10.b)30 supra 11 - 8 supra 11.c)5 supra 18+7 supra 9-1 supra 6.d)5 supra 6 *7 supra 15*12 supra 49.e)25 supra 8:35 supra.
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Explicație pas cu pas:
a. 3/10+7/10=10/10=1
b. 30/11-8/11=22/11=2
c. 5/18+7/9-1/6 =
=5/18+14/18-3/18=
=16/18=8/9
d. 5/6×7/15×12/49=
=5/15×7/6×12/49
=1/3×7/49×12/6
=1/3×1/7×2/1
=2/21
e. 25/8÷35/
ai uitat să scrii supra cât
=25/8× /35
=25/35× /8
=5/7× /8
5× /56