1 i 1/20 * 2 i 22/49* to znaczy mnożenie a / kreske ulamkowa
1 1/20*2 22/49=21/20*120/49=126/49=2 28/49
1 + 1/20 = 1 1/20
2 + 22/49 = 2 22/49
1 1/20 * 2 22/49 = (20 z mianownika * 1 cała + 1 z licznika)=21/20*(49 z mianownika * 2 całe + 22)=120/49 * 21/20= 120 * 21/49 * 20=2,520/980
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1 1/20*2 22/49=21/20*120/49=126/49=2 28/49
1 + 1/20 = 1 1/20
2 + 22/49 = 2 22/49
1 1/20 * 2 22/49 = (20 z mianownika * 1 cała + 1 z licznika)=21/20*(49 z mianownika * 2 całe + 22)=120/49 * 21/20= 120 * 21/49 * 20=2,520/980