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

Toán Lớp 5: tính thuận tiện: (60-26,75-13,25)+(78,9+79,9x 6,5 x 2)x(11,25-0,75×15)

Toán Lớp 5: tính thuận tiện: (60-26,75-13,25)+(78,9+79,9x 6,5 x 2)x(11,25-0,75×15)

Comments ( 1 )

  1. (60 – 26,75 – 13,25 ) + ( 78,9 + 78,9 xx 6,5 xx 2 ) xx ( 11,25 – 0,75 xx 15 )
    = ( 33,25 – 13,25 ) + ( 78,9 + 78,9 xx 6,5 xx 2 ) xx ( 11,25 – 11,25 )
    = 20 + ( 78,9 + 78,9 xx 6,5 xx 2 ) xx 0
    = 20 + 0
    = 20
    #dtkc

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

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