Zad 28 str 159 Oblicz pamiętając o skracaniu: 3/8×6÷4= 2/5÷4×7= 18×5/12÷15= 1 1/9×3÷11= 2 4/5÷7×8= 6×3 1/3÷5= Matematyka 2001 kl.5

3/8 * 6 : 4= = 3/4 * 3 * 1/4= = 9/16 2/5 : 4* 7= = 2/5 * 1/4 * 7= = 1/5 * 1/2 * 7= = 7/10 18 * 5/12 : 15= = 3 * 5/2 * 1/15= = 15/2 * 1/15= = 1/2 * 1/1= = 1/2 1 i 1/9 * 3 : 11= = 10/9 * 3 * 1/11= = 10/3 * 1 * 1/11= = 10/33 2 i 4/5 : 7 * 8= = 14/5 * 1/7 * 8= = 2/5 * 1/1 * 8= = 16/5= = 3 i 1/5 6 * 3 i 1/3 : 5= = 6 * 10/3 * 1/5= = 2 * 2/1 * 1/1 = = 4/1= = 4

3/8×6÷4=3/4 * 3 : 4 = 9/4 : 4= 9/16 2/5÷4×7=1/(5*2) * 7=7/10 18*5/12:15=18*5/(12*15) = 3/(2*3) = 1/2 1 1/9×3÷11= 10*3/(9*11)=10/(3*11)=10/33 2 4/5÷7×8= 14/(5*7) *8 = 2/5 * 8=16/5 = 3,2 6×3 1/3÷5= 6 * 10/3 : 5 = 2/10 : 5 = 1/5 : 5 = 1/25