Răspuns :
a)59/3+40/3=99/3=33
5/11 din 33=33:11*5=3*5=15
b)117/4-9/4=108/4=27
7/9 din 27=27:9*7=3*7=21
5/11 din 33=33:11*5=3*5=15
b)117/4-9/4=108/4=27
7/9 din 27=27:9*7=3*7=21
5/11 din (59/3+40/3)=5/11 *33=5*3=15
7/9 din(117/4-9/4)=7/9 *108/4=756/36=21
7/9 din(117/4-9/4)=7/9 *108/4=756/36=21