1. в) -5:2<0
-2.5<0
2. a) -8*9=-72
б) -8,35*100 = -(8,35*100) = -835
в) -36:4 = -9
г) -60,4 : (-0,4) = 60,4 : 0,4 = 151
3. а) 10х=-5
х= - 
= -
б) х:(-0,2) = 8
х:(-
) = 8
-х*5 = 8
-5х = 8
х = -
4. а) -6,2*3 = -18,6
б) -19,68 : (-0,8) = 19,68 : 0,8 = 24,6
в) 16,32: (-16) = -(16,32: 16) = -1,02
5. а) 0,5*(-36)*2 = -(0,5*36*2)= -(18*2) = -36
б) -500*37,38(-2)*0,1 = 18690*2*0,1=1869*2=2
6. (0,8-2,86:2,6)*(3,04-7,02) = (0,8-1,43)(-3,98) = -0,63*(-3,98) = 2,5
7. |-3x-1.5| = 0.5
-3x-1.5 = 0.5 -3x-1.5 = -0.5
-3x= 0.5 + 1.5 -3x = -0.5 + 1.5
-3x = 2 -3x = 1
x= - 
x = -
The beardless sly man Aldar-Kose lived in one aul. His eyes were sharp, his legs were quick, his hands were agile, and his mind was even more agile. Aldar-Kose loved to joke and laugh, especially at fools and misers. He had no wealth, but by cunning he did not get himself a meal of fat ram.
Zhatyr-bai was a greedy and stupid person. His flocks were large: he would start counting at dawn, and finish at dusk. Once Aldar-Kose came to him and said:
- Honorable buy, I have two rubles, but no wallet. I walk, hold the money in my hand - my hand is tired. I want to get rid of this money. Will you help me?
- Come on, come on, I will help! - buy was delighted. - Just tell me how?
“Sell me some poor little goat for two rubles,” says Aldar-Kose.
Thought, thought buy: "Well, you can sell." He caught a lame goat in the herd, skinny, barely alive, which had only two days left to die, and gave to Aldar-Kose:
- Here, take it, although it's a pity to give it away cheaply. Good kid. Give me two rubles!
Aldar-Kose took a goat, and keeps money in his fist:
- You know what, honorable buy. I changed my mind. Take two rubles and a kid to boot, and give me a lamb.
“Well, not a bad exchange,” thought Bay, “two rubles and even a kid to boot!” - and went to catch the lamb. Caught the smallest and serves Aldar-Kose:
- Here, take it. Nice lamb. Give me two rubles and a kid.
Aldar-Kose took the lamb, but he holds the money in his fist and does not let go of the goat:
- You know what, honorable buy. I changed my mind. Take two rubles, a kid and a lamb to boot, and give me a goat.
"Not a bad exchange," thought Bay, "two rubles and a goat, and even a lamb to boot." And he went to catch a goat. He caught the thinnest one and serves to Aldar-Kose:
- Here, take it, good goat. Give me two rubles, a kid and a lamb.
- Wait, wait, respectable bay! - says Aldar-Kose. - I changed my mind. Take two rubles, a kid, a lamb and a goat in addition, and give me only one ram, but let me choose it myself.
“This exchange is more profitable than all the others! - thought the delighted buy. - Two rubles, a kid, a lamb and even a goat to boot - and all this for one ram! And he says to Aldar-Kose:
- Well, choose!
He chose Aldar-Kose for himself the biggest, fatty ram, gave the bai two rubles, a kid, a lamb and a goat in addition, put the ram on his shoulders and went, and bai Zhatyr-bai laughed, rubbing his hands:
- What a fool Aldar-Kose! He gave so much good for just one ram!
Bay did not understand which of them was the fool.
