а) ( 9.8 * 8.2) + 23.7 = ( 6.2 * 8.2) + 55.1 = 80.36 + 23.7 + 50.84 + 55.1 = 210
( 9.8 * 0.7 ) + 23.7 + (6.2 * 0.7) + 55.1 = 6.86 + 23.7 + 4.34 + 55.1 = 90
б) ( 5.1 * 0.6 + 1.38) - 3.4 * 0.6 = 3.06 + 1.38 - 2.04 = 2.4
( 5.1 * 1.8 + 1.38) - 3.4 * 1.8 = 9.18 + 1.38 - 6.12 = 4.44
в) 44.2 * 0.9 - 15.7 * 0.9 + 23.5 = 39.78 - 14.13 + 23.5 = 49.15
44.2 * 1.7 - 15.7 * 1.7 + 23.5 = 75.14 - 26.69 + 23.5 = 71.95
г) 0.056 * 3.7 - 0.037 = 0.2072 - 0.037 = 0.1702
0.056 * 0.37 - 0.037 = 0.02072 - 0.037 = 0.01628
д) 3.45 * 7.6 - 3.44 * 7.6 + 0.024 = 26.22 - 26.144 + 0.024 = 0.1
3.45 * 0.6 - 3.44 * 0.6 + 0.024 = 2.07 - 2.064 + 0.024 = 0.03
Б)) 28/45: 12= 28/45• 1/12= 7/45• 1/3= 7/135;
В)) 1: 5/9= 1• 9/5= 9/5= 1 4/5.
Г)) 3 11/15: 7/12= (3•15+11)/15• 12/7= 56/15• 12/7= 8/15• 12/1= 8/5• 4/1= 32/5= 6 2/5.
Д)) 3 17/21: 16= (21•3+17)/21• 1/16= 80/21• 1/16= 5/21• 1/1= 5/21.
Е)) 4 5/18: 1 13/42= (18•4+5)/18: (42•1+13)/42= 77/18: 55/42= 77/18• 42/55= 7/18• 42/5= 7/3• 7/5= 49/15= 3 4/15.
Ж)) 5/9: 1 4/5= 5/9: (5•1+4)/5=5/9: 9/5= 5/9• 5/9= 25/49.
З)) 25 5/18: 5= (25•18+ 5)/18• 1/5= 450/18• 1/5= 90/18• 1/1= 90/18=5.