Oblicz
a)1 1/2 × 4/5
b) 2 1/4 × 5/6 × 1 3/5
c)1/2 ÷ 3/4
d) 1 1/3 ÷ 1 1/2
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A) 1 1/2 ×4/5= 3/2 ×4/5=3/1 ×2/5=6/5=1 1/5
B) 2 1/4×5/6×1 3/5= 9/4 ×5/6×8/5=3/4×5/2×8/5=3/4×4=3
C) 1/2÷3/4=1/2×4/3=2/3
D) 1 1/3 ÷ 1 1/2= 4/3 ÷3/2= 4/3×2/3=8/9
Szczegółowe wyjaśnienie: