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

Toán Lớp 4: Tính bằng cách hợp lí: A,935×2+935×6. D,4×782+782×5. B,386×7-386×5. E,8x

Toán Lớp 4: Tính bằng cách hợp lí:
A,935×2+935×6. D,4×782+782×5.
B,386×7-386×5. E,8×864-864×2.
C,36×327+63×327+327. G,492+492×135-492×36.

Comments ( 2 )

  1. Tính bằng cách hợp lí:
    a) 935×2+935×6
    =935×(2+6)
    =935×8
    =3480
    b) 386×7-386×5
    =386×(7-5)
    =386×2
    =772
    c) 36×327+63×327+327
    =36×327+63×327+327×1
    =327×(36+63+1)
    =327×100
    =32700
    d) 4×782+782×5
    =782×(4+5)
    =782×9
    =7038
    e) 8×864-864×2
    =864×(8-2)
    =864×6
    =5184
    g) 492+492×135-492×36
    =492×1+492×135-492×36
    =492×(1+135-36)
    =492×100
    =49200
    __________________chúc bạn học tốt_________________
    (nếu sai thì bảo mik nha ^-^)
    ———-xin hay nhất nha !!!————-
     

  2. a) 935 × 2 + 935 × 6
    = 935 × ( 2 + 6 )
    = 935 × 8
    = 7480
    b) 386 × 7 – 386 × 5
    = 386 × ( 7 – 5 )
    = 386 × 2
    = 772
    c) 36 × 327 + 63 × 327 + 327
    = 36 × 327 + 63 × 327 + 327 × 1
    = ( 36 + 63 + 1 ) × 327
    = 100 × 327
    = 32700
    d) 4 × 782 + 782 × 5
    = ( 4 + 5 ) × 782
    = 9 × 782
    = 7038
    e) 8 × 864 – 864 × 2
    = 864 × ( 8 – 2 )
    = 864 × 6
    = 5184
    g) 492 + 492 × 135 – 492 × 36
    = 492 × 1 + 492 × 135 – 492 × 36
    = 492 × ( 1 + 135 – 36 )
    = 492 × 100
    = 49200
    #$Gin :333$

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