№ 2.
3,1²+2,9²=9,61+8,41=18,02
(5,3-(-4,7))²=(5,3+4,7)²=10²=100
(1,37+(-1,35))³=(1,37-1,35)³=0,02³=0,000008
№ 3.
1) (0,008+0,992):(5*0,6-1,4)=0,625
1. 0,008+0,992=1
2. 5*0,6=3
3. 3-1,4=1,6
4. 1:1,6=0,625
2) 13,5*9,1*(-3,3):(-0,00013)=3118500
1. 13,5*9,1=122,85
2. 122,85*(-3,3)=-405,405
3. -405405:(-0,00013)=3118500
3) (8 7/12 - 2 17/36) * 2,7 - 4 1/3 : 0,65 = 9 5/6
1. 8 7/12 - 2 17/36 = 8 21/36 - 2 17/36 = 6 4/36 = 6 1/9
2. 6 1/9 * 2,7 = 55/9 * 27/10 = 33/2 = 16,5
3. 4 1/3 : 0,65 = 13/3 : 65/100 = 13/3 * 100/65 = 20/3 = 6 2/3
4. 16,5- 6 2/3 = 33/2 - 20/3 = 99/6 - 40/6 = 59/6 = 6 5/6
4) (1 11/24 + 13/36)*1,44- 8/15 * 0,5625=2,32
1. 1 11/24 + 13/36 = 1 33/72 + 26/72 = 1 59/72
2. 1 59/72 * 1,44 = 131/72 * 144/100 = 131/50=2,62
3. 8/15 * 0,5625 = 8/15 * 5625/10000 = 3/10=0,3
4. 2,62-0,3=2,32
№ 4.