Răspuns
Explicație pas cu pas:
9.a. 19/130÷38/260=19/130x260/38=2/2=1
b. 17÷31si1/6=17÷187/6=17x6/187=6/11
c. 14÷3si1/2=14÷7/2=14x2/7=4
d. 3si5/6÷1si11/12=23/6÷23/12=23/6x12/23=2
e. 3si4/5÷1si2/17=19/5÷19/17=19/5x17/19=17/5=3si2/5
f. 4/5÷1si2/ex2si1/12=4/5÷5/3x25/12=4/5x3/5x25/12=3/3=1
g. 31si1/4÷20si5/6=125/4÷125/6=125/4x6/125=3/3=1si1/2
h. 20si2/3÷15si2/4=62/3÷62/4=62/3x4/62=4/3=1si1/3
