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

Toán Lớp 7: – ( 2,73 × 4 + 2,85 ) + 4 × 2,73 – ( 2 – 2,85 ) Giúp mình vs mình đag cần gấp ????????????

Toán Lớp 7: – ( 2,73 × 4 + 2,85 ) + 4 × 2,73 – ( 2 – 2,85 )
Giúp mình vs mình đag cần gấp ????????????

Comments ( 2 )

  1. -( 2,73 xx 4 + 2,85) + 4 xx 2,73 – ( 2 – 2,85)
    =-( 2,73 xx 4 + 2,85) + 4 xx 2,73 – 2 + 2,85
    = -( 2,73 xx 4 + 2,85) + ( 4 xx 2,73 + 2,85) – 2
    = -[( 2,73 xx 4 + 2,85) – ( 4 xx 2,73 + 2,85)] – 2
    = 0 – 2
    = -2

  2. -(2,73×4+2,85)+4×2,75-(2-2,85) 
    =-(2,73×4+2,85)+4×2,75-2+2,85
    =-(2,73×4+2,85)+(2,75×4+2,85)-2
    =0-2
    =-2 

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

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