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

Toán Lớp 6: Bỏ ngoăc rồi tính a. (25-38+13)+(202-63-27) b. (97+43-15)-(87+33-25) c. -(-24+63-71)-(14+73-81).

Tháng Năm 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: Bỏ ngoăc rồi tính
a. (25-38+13)+(202-63-27)
b. (97+43-15)-(87+33-25)
c. -(-24+63-71)-(14+73-81).

Comments ( 2 )

  1. tuyetnhungthu
    tuyetnhungthu
    26 Tháng Năm, 2022 at 8:32 chiều
    Reply
    a. ( 25 – 38 + 13 ) + ( 202 – 63 – 27 )
    = 25 – 38 + 13 + 202 – 63 – 27
    = – 13 + 13 + 202 – 90
    = 0 + 112
    = 112
    b. ( 97 + 43 – 15 ) – ( 87 + 33 – 25 )
    = 97 + 43 – 15 – 87 – 33 + 25
    = ( 97 – 87 ) + ( 43 – 33 ) + ( 25 – 15 )
    = 10 + 10 + 10
    = 30
    c. – ( – 24 + 63 – 71 ) – ( 14 + 73 – 81 )
    = 24 – 63 + 71 – 14 – 73 + 81
    = ( 81 – 71 ) + ( 24 – 14 ) – ( 63 + 73 )
    = 10 + 10 – 136
    = 20 – 136
    = – 116

  2. mocmien87
    mocmien87
    26 Tháng Năm, 2022 at 8:31 chiều
    Reply
    a) (25 – 38 + 13) + (202 – 63 – 27)
    = 25 – 38 + 13 + 202 – 63 – 27
    = -13 + 13 + 202 – 63 – 27
    = 0 + 202 – 63 – 27
    = 202 – 63 – 27
    = 139 – 27 = 112
    b) (97 + 43 -15) – (87 + 33 – 25)
    = 97 + 43 – 15 – 87 – 33 + 25
    = 140 – 15 – 87 – 33 + 25
    = 125 – 87 – 33 + 25
    = 38 – 33 + 25
    = 5 + 25 = 30
    c) -(-24 + 63 – 71) – (14 + 73 – 81)
    = 24 – 63 – 71 – 14 – 73 + 81
    = -39 – 71 – 14 – 73 + 81
    = -110 – 14 – 73 + 81
    = -124 – 73 + 81
    = -197 + 81
    = -116

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

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