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

Toán Lớp 6: Help me! Thực hiện phép tính: a) 12: { 400: [ 500- ( 125+ 25.7 )]} b) 18: 3+ 182+ 3. ( 51: 17 ) c) 25. 8- 12. 5+ 170: 17-8

Toán Lớp 6: Help me!
Thực hiện phép tính:
a) 12: { 400: [ 500- ( 125+ 25.7 )]}
b) 18: 3+ 182+ 3. ( 51: 17 )
c) 25. 8- 12. 5+ 170: 17-8

Comments ( 2 )

  1. $@Shin$
    a) 12 : { 400 : [ 500- ( 125+ 25.7 )]}
    = 12 : { 400 : [ 500- ( 125+ 175 )]}
    = 12 : { 400 : [ 500- 300 ]}
    = 12 : { 400 : 200 }
    = 12 : 2
    = 6
    b) 18: 3+ 182+ 3. ( 51: 17 )
    = 18 : 3+ 182+ 3. 3
    = 6 + 182 + 9
    = 197
    c) 25. 8- 12. 5+ 170: 17-8
    = 200 – 60 + 10 – 8
    = 142

  2. a)12:{400:[500-(125+25.7)]}
    =12:{400:[500-(125+175)]}
    =12:[400:(500-300)]
    =12:(400:200)
    =12:2
    =6
    b)18:3+182+3.(51:17)
    =6+182+3.3
    =188+9
    =197
    c)25.8-12.5+170:17-8
    =200-60+10-8
    =140+10-8
    =150-8
    =142
     

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

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