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

Toán Lớp 6: Tính : a/ (187 -23) – (20 – 180) b/ (-50 +19 +143) – (-79 + 25 + 48) c/ 11 – 12 + 13 – 14 + 15 – 16 + 17 – 18 + 19 – 20 d/ 101 – 102 –

Toán Lớp 6: Tính :
a/ (187 -23) – (20 – 180)
b/ (-50 +19 +143) – (-79 + 25 + 48)
c/ 11 – 12 + 13 – 14 + 15 – 16 + 17 – 18 + 19 – 20
d/ 101 – 102 – (-103) – 104 – (-105) – 106 – (-107) – 108 – (-109) – 110

Comments ( 2 )

  1. Giải đáp:
    a) (187 -23) – (20 – 180) = 187 – 23 – 20 + 180
                                             = 164 – 20 + 180
                                             = 144 + 180
                                             = 324
    b) (-50 +19 +143) – (-79 + 25 + 48)
    = (-50) + 19 + 143 + 79 – 25 – 48                                             
    = (-31) + 143 + 79 – 25 – 48
    = 112 + 79 – 25 – 48 
    = 191 – 25 – 48
    = 166 – 48
    = 118
    c) 11 – 12 + 13 – 14 + 15 – 16 + 17 – 18 + 19 – 20
    = (11 – 12) + (13 – 14) + (15 – 16) + (17 – 18) + (19 – 20)
    = (-1) + (-1) + (-1) + (-1) + (-1)
    = -(1+1+1+1+1)
    = -5
    d) 101 – 102 – (-103) – 104 – (-105) – 106 – (-107) – 108 – (-109) – 110
    101 – 102 + 103 – 104 + 105 – 106 + 107 – 108 + 109 – 110
    = (101 – 102) + (103 – 104) + (105 – 106) + (107 – 108) + (109 – 110)
    = (-1) + (-1) + (-1) + (-1) + (-1)
    = -(1+1+1+1+1)
    = -5
    #tambip

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     a, (187-23)-(20-180)
    = 164 + 160
    = 324
    b, (-50 +19 +143) – (-79 + 25 + 48)
    = 112 + 6
    = 118
    c, 11 – 12 + 13 – 14 + 15 – 16 + 17 – 18 + 19 – 20
    = -1 -1 – 1 – 1 – 1
    = -5
    d, 101 – 102 – (-103) – 104 – (-105) – 106 – (-107) – 108 – (-109) – 110
    = 101 – 102 + 103 – 104 + 105 – 106 + 107 – 108 + 109 – 110
    = -1 – 1 – 1 – 1 – 1
    = -5
    #Chii
    #Tired of studying well

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