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efectuati : 3 supra 4 - 3 supra 4 : 0,1; 2 supra 3 × -6 supra 5 + 3supra 4 × 4 supra -5

Răspuns :

3/4-3/4 : 0,1 =
0:0,1=0

2/3 x 6/5 + 3/4 x 4/-5=
Simplificam 3 si 6 prin 3.
2/1 x 2/5 + 3/4 x 4/-5=
4/5+12/-25=
Amplificam prima fractie cu 5.
20/25+12/-25= 32/25.

Coronita?