Môn Toán Lớp 6: 3/14 -5/17 11/14 -29/17 4/11 .9/13-21/23 : 11/4 4/11 5/7 . -4/19 -15/7.5/19-2/7

Question

Môn Toán Lớp 6:  3/14 +-5/17 +11/14 +-29/17 4/11 .9/13-21/23 : 11/4 +4/11 5/7 . -4/19 +-15/7.5/19-2/7

thanhtung · Answer

a    = ( 3/14 + 11/14 ) + [-5/17 + (-29/17)]   =            1             +             (-2)   =                            -1   b    =4/11.9/13-21/13.4/11+4/11.1   =4/11.( 9/13 -21/13 + 1)   =4/11.           1/13   =          4/143   c   =5/7 . (-4/19) +(-15/19) . 5/7 -2/7   =5/7 . [-4/19 + (-15/19)]-2/7   =5/7 .           (-1)            - 2/7   =               -5/7              - 2/7   =                 -1

ngocle44 · Answer

3/14+{-5}/17+11/14+{-29}/17   =(3/14+11/14)+({-5}/7+{-29}/17)   =14/14+{-34}/17 =1+(-2)   =-1   ______________________________________   4/11 . 9/13 - 21/23 : 11/4 + 4/11   =4/11 . 9/13 - 21/23 . 4/11+4/11   =4/11 . (9/13-21/23+1)   =4/11 . (207/299-273/299+299/299)   =4/11 . 233/199   =932/3289   _____________________________________   5/7 . {-4}/19+{-15}/7 . 5/19 -2/7   =5/7 . {-4}/19 + 5/7 . {-15}/19 - 2/7   =5/7 . ({-4}/19+{-15}/19)-2/7   =5/7 . {-19}/19 - 2/7   =5/7 . (-1)-2/7   =-5/7+{-2}/7   =-7/7   =-1   #BaoNgoc

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