Oblicz ułamki. 4 piąte + 1 dziesiąta = .... 1 szósta + 2 trzecie = .... 4 siódme + 1 druga = .... 3 drugie + 1 piąta = .... 8 dziewiątych - 1 trzecia = .... 4 całe i 3 siódme + 2 całe i 2 trzecie = .... 2 całe i 2 piąte + 3 całe i 1 druga = ....
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4/5 + 1/10 = 9/10 = 0,9
1/6 + 2/3 = 5/6
4/7 + 1/2 = 8/14 + 7/14 = 15/14 = 1 1/14
3/2 + 1/5 = 15/10 + 2/10 = 17/10 = 1 7/10
8/9 - 1/3 = 8/9 - 3/9 = 5/9
4 3/7 + 2 2/3 = 31/7 + 8/3 = 93/21 + 56/21 = 149/41 = 3 26/41
2 2/5 + 3 1/2 = 12/5 + 7/2 = 24/10 + 35/10 = 59/10 = 5 9/10