Toán Giúp mik lần nx nha 13/15-2/7- -2/15+13/14- |-1/2|-8/17-1/6 04/10/2021 By Valentina Giúp mik lần nx nha 13/15-2/7- -2/15+13/14- |-1/2|-8/17-1/6
Đáp án + giải thích bước giải : `13/15 – 2/7 – (-2)/15 + 13/4 – |-1/2| – 8/17 – 1/6` `= 13/15 – 2/7 + 2/15 + 13/4 – 1/2 – 8/17 – 1/6` `= 61/105 + 2/15 + 13/4 – 1/2 – 8/17 – 1/6` `= 5/7 + 13/4 – 1/2 – 8/17 – 1/6` `= 111/28 – 1/2 – 8/17 – 1/6` `= 97/28 – 8/17 – 1/6` `= 1425/476 – 1/6` `= 361/714` Trả lời
Đáp án: 3/15-2/7- -2/15+13/14- |-1/2|-8/17-1/6 =[3/15-(-2/15)]+(13/14-2/7-8/17)-1/2-1/6 =1/3+(13/14-4/7-8/17)-1/2-1/6 =1/3+1/14-1/2-1/6 =(1/3-1/6)-(1/2-1/14)=1/3-3/7=7/21-9/21=-2/21 Trả lời
Đáp án + giải thích bước giải :
`13/15 – 2/7 – (-2)/15 + 13/4 – |-1/2| – 8/17 – 1/6`
`= 13/15 – 2/7 + 2/15 + 13/4 – 1/2 – 8/17 – 1/6`
`= 61/105 + 2/15 + 13/4 – 1/2 – 8/17 – 1/6`
`= 5/7 + 13/4 – 1/2 – 8/17 – 1/6`
`= 111/28 – 1/2 – 8/17 – 1/6`
`= 97/28 – 8/17 – 1/6`
`= 1425/476 – 1/6`
`= 361/714`
Đáp án:
3/15-2/7- -2/15+13/14- |-1/2|-8/17-1/6
=[3/15-(-2/15)]+(13/14-2/7-8/17)-1/2-1/6
=1/3+(13/14-4/7-8/17)-1/2-1/6
=1/3+1/14-1/2-1/6
=(1/3-1/6)-(1/2-1/14)=1/3-3/7=7/21-9/21=-2/21