Oblicz, wykonując skracanie, jeśli to możliwe: a) 7/8 * 16 = b) 4/5 * 15 = c) 21 * 2/3 = d) 18 * 1/2 = e) 5/8 * 6 = f) 8 * 7/12
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a) 7/8 * 16 = 7*2=14
b) 4/5 * 15 = 4*3=12
c) 21 * 2/3 =2*7=14
d) 18 * 1/2 =9*1=9
e) 5/8 * 6 =5/4 * 3=15/4=3i3/4
f) 8 * 7/12=2*7/3=14/3=4i2/3
7/8*16=14
4/5*15=12
21*2/3=14
18*1/2=9
5/8*6=3,75
8*7/12=5,25