1.
1) 2,2 * 13,1 = 28,82
2) -4,7 * 2,2 = - 10,34
3) 28,82 - (-10,34) = 39,16
2.
1,5 - х = 10 1/4 : 5
1,5 - х = 41/4 * 1/5
1,5 - х = 2 1/20
х = 1,5 - 2 1/20
х = 1 5/10 - 2 1/20
х = 1 10/20 - 2 1/20
х = 30/20 - 41/20
х = -11/20
3.
1) - 33/35 : 6/7 = -33/35 * 7/6 = -11/10
2) 7/36 : (-5/6) = 7/36 * (-6/5) = - 7/30
3) -11/10 + (-7/30) = -33/30 - 7/30 = - 40/30 = -4/3
4) -4/3 * 1,2 = -4/3 * 1 2/10 = -4/3 * 1 1/5 = -4/3 * 6/5 = -24/15 = -8/5 = -1 3/5
2) ответ: -0,55
3) ответ: -1,6
1.
1) 2,2 * 13,1 = 28,82
2) -4,7 * 2,2 = - 10,34
3) 28,82 - (-10,34) = 39,16
2.
1,5 - х = 10 1/4 : 5
1,5 - х = 41/4 * 1/5
1,5 - х = 2 1/20
х = 1,5 - 2 1/20
х = 1 5/10 - 2 1/20
х = 1 10/20 - 2 1/20
х = 30/20 - 41/20
х = -11/20
3.
1) - 33/35 : 6/7 = -33/35 * 7/6 = -11/10
2) 7/36 : (-5/6) = 7/36 * (-6/5) = - 7/30
3) -11/10 + (-7/30) = -33/30 - 7/30 = - 40/30 = -4/3
4) -4/3 * 1,2 = -4/3 * 1 2/10 = -4/3 * 1 1/5 = -4/3 * 6/5 = -24/15 = -8/5 = -1 3/5