Odpowiedź:
a)
3,2 • 7 = 22,4
6 • (-2,4) = -14,4
1,2 • 2,3 = 2,76
-2,03 • 3,1 = -6,293
b)
2/3 • 7/11 = 14/33
-5/7 • (-4/9) = 20/63
32/55 • 5/8 = 4/11
7/36 • 12/49 = 1/3 * 1/7 = 1/21
c)
2 2/3 • 9/32 = 8/3 * 9/32 = 3/4
1 2/5 • 1 1/14 = 7/5 * 15/14 = 3/2 = 1 1/2
2 1/7 • (-4 1/5) = -15/7 * 21/5 = -3*3 = -9
-1 5/11 • (-1 2/20) = 16/11 * 22/20 = 4 * 2/5 = 8/5 = 1 3/5
d)
3,2 : 4 = 0,8
6,3 : (-0,9) = -7
1,2 : 2,4 = 0,5
-0,66 : 3,3 = -0,2
e)
2/7 : 6/7 = 2/7 * 7/6 = 1/3
-5/12 : (-5/16) = 5/12 * 16/5 = 4/3 = 1 1/3
32/45 : 24/25 = 32/45 * 25/24 = 4/9 * 5/3 = 20/27
-35/36 : 21/8 = -35/36 * 8/21 = -5/9 * 2/3 = -10/27
f)
2 2/3 : 4/15 = 8/3 * 15/4 = 2 * 5 = 10
-1 5/11 : (-20/22) = 16/11 * 22/20 = 4 * 2/5 = 8/5 = 1 3/5
1 2/5 : 2 1/10 = 7/5 : 21/10 = 7/5 * 10/21 = 2/3
2 1/7 : (-1 4/21) = -15/7 : 25/21 = -15/7 * 21/25 = -3 * 3/5 = -9/5 = -1 4/5
Szczegółowe wyjaśnienie:
