Shiyun used
29 of the string to tie some presents. She threw away
57 of the remaining string. As a result, she had 34 cm of the string left. How much string did Shiyun have at first? Give your answer in cm.
Fraction of the string left after tying some presents
= 1 -
29=
79 Fraction of the remaining string left after throwing away
= 1 -
57=
27
Fraction of the total string left
=
79 ×
27=
29
Length of the string at first = 9 u
Length of the string left = 2 u
2 u = 34
1 u = 34 ÷ 2 = 17
Length of the string at first
= 9 u
= 9 x 17
= 153 cm
Answer(s): 153 cm