Tina used
35 of the thread to tie some presents. She threw away
311 of the remaining thread. As a result, she had 256 cm of the thread left. How much thread did Tina have at first? Give your answer in cm.
Fraction of the thread left after tying some presents
= 1 -
35=
25 Fraction of the remaining thread left after throwing away
= 1 -
311=
811
Fraction of the total thread left
=
25 ×
811=
1655
Length of the thread at first = 55 u
Length of the thread left = 16 u
16 u = 256
1 u = 256 ÷ 16 = 16
Length of the thread at first
= 55 u
= 55 x 16
= 880 cm
Answer(s): 880 cm