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

Toán Lớp 6: c) 35.34 +35.38 + 65.75 + 65.45 d) 39.8 + 60.2 + 21.8 e) 36.28 + 36.82 + 64.69 + 64.41

Toán Lớp 6: c) 35.34 +35.38 + 65.75 + 65.45 d) 39.8 + 60.2 + 21.8
e) 36.28 + 36.82 + 64.69 + 64.41

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    c) 35.34 + 35.38 + 65.75 + 65.45
    = 35 . (34 + 38)  + 65 . (75 + 45)
    = 35 . 72 + 65 . 120
    = 2520 + 7800
    = 10320
    d) 39.8 + 60.2 + 21.8
    = (39 + 21).8 + 60.2
    = 60.8 + 60.2
    = 60.(8 + 2)
    = 60 . 10
    = 600
    e) 36.28 + 36.82 + 64.69 + 64.41
    = (28 + 82).36 + (69 + 41).64
    = 110.36 + 110.64
    = 110 . (36 + 64)
    = 110 . 100
    = 11000 

  2. c)
    =35.(34+38)+65.(45+75)
    =35.72+65.130
    =72.130.(35+65)
    =9360.100
    =936000
    d)
    =(21+39).(2+8).60
    =60.10.60
    =60.10
    =600
    e)
    =(64+36).(28+82).(69+41)
    =100.110.110
    =110.100
    =11000

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