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

Toán Lớp 6: a)59×67-33x(-59) b)68x(-33)-33×32

Toán Lớp 6: a)59×67-33x(-59)
b)68x(-33)-33×32

Comments ( 2 )

  1. a) 59 xx 67 – 33 xx (-59)
    = 59  xx 67 – (-33) xx 59
    = 59 xx (67 – (-33)
    = 59 xx 100
    = 5900
    b) 68 xx (-33) – 33 xx 32
    = (-68) xx 33 – 33 xx 32
    = 33 xx [(-68) – 32]
    = 32 xx 100
    = 3200

  2. a)59xx67-33xx(-59)
    =59xx67-(-33)xx59
    =59xx67+33xx59
    =59xx(67+33)
    =59xx100
    =5900
    b)68xx(-33)-33xx32
    =(-68)xx33-33xx32
    =33xx[(-68)-32]
    =33xx(-100)
    =-3300

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