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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Bài 1. Bỏ ngoặc rồi tính. a) ( -34 + 62 ) – ( -134 + 162 ) b) – (68 + 137 ) + ( 168 – 63 ) c) ( 230 – 188 ) – ( 430 – 88 ) d) ( – 67 +

Toán Lớp 6: Bài 1. Bỏ ngoặc rồi tính.
a) ( -34 + 62 ) – ( -134 + 162 )
b) – (68 + 137 ) + ( 168 – 63 )
c) ( 230 – 188 ) – ( 430 – 88 )
d) ( – 67 + 132 ) – ( – 167 + 132 )

Comments ( 2 )

  1. Lời giải chi tiết:
    a) (-34+62)-(-134+162)
    =-34+62+134-162
    =(-34+134)-(162-62)
    =100-100
    =0
    b) -(68+137)+(168-63)
    =-68-137+168-63
    =(-68+168)-(137+63)
    =100-200
    =-100
    c) (230-188)-(430-88)
    =230-188-430+88
    =(230-430)-(188-88)
    =-200-100
    =-300
    d) (-67+132)-(-167+132)
    =-67+132+167-132
    =(-67+167)+(132-132)
    =100+0
    =100

  2. $#Paow$
    a) ( -34 + 62 ) – ( -134 + 162 )
    =-34+62+134-162
    =(-34+134)+(62-162)
    =100+(-100)
    =0
    b) – (68 + 137 ) + ( 168 – 63 )
    =-68-137+168-63
    =(-68+168)+(-137-63)
    =100+(-200)
    =-100
    c) ( 230 – 188 ) – ( 430 – 88 )
    =230-188-430+88
    =(230-430)+(-188+88)
    =-200+(-100)
    =-300
    d) ( – 67 + 132 ) – ( – 167 + 132 )
    =-67+132+167-132
    =(-67+167)+(132-132)
    =100+0
    =100
     

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222-9+11+12:2*14+14 = ? ( )