3*2 4/9 3 1/4*1 2/5 4 2/7"3 13,506"0,12 / - kreska ułamkowa " - dzielenie(bo nie umiem inaczej

3×22/9=66/9=7i3/9 13/4×7/5=91/20=4i11/20 4 2/7"3=30/7:3=30/21 13,506"0,12=112,55

2 6/9 4,55 1 3/7 112,55

3×2 4/9 = 3/1 × 22/9 = 22/3 = 7,33 3 1/4×1 2/5 = 13/4 × 7/5 = 91/20 = 4,55 4 2/7:3 = 30/7 : 3/1 = 30/7 × 1/3 = 10/7 (dziesięć siódmych) = 1,43 13,506:0,12 = 13506/1000 : 12/100 = 13506/1000 × 100/12 = 2251/10 × 1/2 = 2251/20 = 112,55