Đáp án:
Giải thích các bước giải:
`a, 10/17 - 5/13 - 7/12 - 8/13 + (-11)/15`
= `10/17 - ( 5/13 + 8/13 ) - ( 7/12 + 11/15 )`
= `10/17 - 1 - 79/60`
= `-7/17 - 79/60 = -1763/1020`
`b, 3/5 + 3/11 - (-3)/7 + (-2)/97 + 1/(-35) - 3/4 - 23/44`
= `3/5 + 3/11 + 3/7 - 2/97 - 1/35 - 3/4 - 23/44`
= `( 3/5 - 1/35 ) + ( 3/11 - 23/44 - 3/4 ) + ( 3/7 - 2/97 )`
= `4/7 - 1 + 277/679`
= `277/679 - 3/7 = -2/97`
`c, 1/3 - 1/4 - (3/-5) + 1/72 - 2/9 - 1/36 + 1/15`
= `1/3 - 1/4 + 3/5 + 1/72 - 2/9 - 1/36 + 1/15`
= `( 1/3 + 1/15 + 3/5 ) + ( -1/4 - 2/9 - 1/36 + 1/72 )`
= `( 5/15 + 1/15 + 9/15 ) + ( -18/72 - 16/72 - 2/36 + 1/72 )`
= `1 - 35/72 = 37/72`