2/5 + 2/5 = , 1/4 + 2/4 =, 3/7 + 3/7 =, 4/6 - 2/6 =, 8/4 - 4/4 =, 4/3 - 2/3 =, 3/9 + 5/9 =, 2/8 + 5/8 =, 9/5 - 1 =, 6/10 + 2/10 =, 1 - 7/8 =, 1/7 + 4/7 =,

Murtolukujen yhteen- ja vähennyslasku

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