1 1/5 + 2 2/5 + 3 3/5 1 - 49/50 4/5 - 1/3 1 2/5 x 4/3 -7/5 1/2 x 2/3 x 3/4 x ...... x 49/50
2 câu trả lời
`1 1/5 + 2 2/5 + 3 3/5 = 6/5 + 12/5 + 18/5 = (6 + 12 + 18)/5 = 36/5`
`1 - 49/50 = 50/50 - 49/50 = (50-49)/50 = 1/50`
`4/5 - 1/3 = 12/15 - 5/15 = (12 - 5)/15 = 7/15`
`1 2/5 xx 4/3 - 7/5 = 7/5 xx 4/3 - 7/5 = 7/5 xx ( 4/3 - 1) = 7/5 xx 1/3 = 7/15`
`1/2 xx 2/3 xx 3/4 xx ... xx 49/50 = (1 xx 2 xx 3 xx ... xx 49)/(2 xx 3 xx 4 xx ... xx 50) = 1/50`
`#dtkc`
1 1/5 + 2 2/5 + 3 3/5=7.2
1 - 49/50=0.02
4/5 - 1/3=0.46666666666
1 2/5 x 4/3 -7/5=0.46666666666
1/2 x 2/3 x 3/4 x ...... x 49/50