Odpowiedzi

2010-03-30T19:49:45+02:00
4 1/4 - 2 3/4 = 1 2/4 = 1 1/2

a) 4 - 2 1/4
b) 8 - 1 4/7 + 3 3/7 = 6 3/7 + 3 3/7 = 9 6/7
6 3 6
2010-03-30T19:55:09+02:00
4 1/4-2 3/4=1 2/4=1 1/2
a)4-(5-23/4)=4-(5-5 3/4)=4-(-3/4)=4+3/4=4 3/4
b)8-(2-3/7)+3 3/7=8-1 4/7+3 3/7=6 3/7+3 3/7=9 6/7
3 2 3