Oblicz: a) 2/3 x 1/4 b) jedna cała i 1/2 x 5/6 c)jedna cała i 2/3 x jedna cała i 4/5 5/8 x 2/5 3/4 x dwie całe i 1/3 jedna cała i 3/8 x jedna cała i 1/3 1/2 x 6/7 7/9 x jedna cała i 1/3 dwie całe i 1/4 x jedna cała i 3/5 5/6 x 9/10 trzy całe i 1/3 x 3/10 trzy całe i 1/3 x jedna cała i 2/10
b) 1 1/2 × 5/6 = 3/2 × 5/6 = 15/12 = 5/4 = 1 1/4
c) 1 2/3 × 1 4/5 = 5/3 × 9/5 = 45/15 = 3
d) 5/8 × 2/4 = 10/32 = 5/16
e) 3/4 × 2 1/3 = 3/4 × 7/3 = 21/12 = 7/4 = 1 3/4
f) 1 3/8 × 1 1/3 = 11/8 × 4/3 = 44/32 = 11/8 = 1 3/8
g) 1/2 × 6/7 = 6/14 = 3/7
h) 7/9 × 1 1/3 = 7/9 × 4/3 = 28/27 = 1 1/27
i) 2 1/4 × 1 3/5 = 9/4 × 8/5 = 72/20 = 18/5 = 3 3/5
j) 5/6 × 9/10 = 45/60 = 9/12 = 3/4
k) 3 1/3 × 3/10 = 10/3 × 3/10 = 30/30 = 1
l) 3 1/3 × 1 2/10 = 10/3 × 12/10 = 120/30 = 4