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

Toán Lớp 3: Tính nhanh: 5) 58 – 58 x (6 + 54 – 60) 6) 32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32 7) (1 + 2 + 3 + 4 + – + 9) x (21 x 5 – 21 – 4

Home/ Toán Lớp 3: Tính nhanh: 5) 58 – 58 x (6 + 54 – 60) 6) 32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32 7) (1 + 2 + 3 + 4 + – + 9) x (21 x 5 – 21 – 4

Toán Lớp 3: Tính nhanh: 5) 58 – 58 x (6 + 54 – 60) 6) 32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32 7) (1 + 2 + 3 + 4 + – + 9) x (21 x 5 – 21 – 4

Tháng Mười 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 3: Tính nhanh:
5) 58 – 58 x (6 + 54 – 60)
6) 32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
7) (1 + 2 + 3 + 4 + …. + 9) x (21 x 5 – 21 – 4 x 21)
8) (9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ……..+ 17 + 19)
9) (2 + 4 + 6 + 8 + … + 20) x (56 x 3 – 72 : 9 x 21)

Comments ( 2 )

  1. hoaiphuong85
    hoaiphuong85
    26 Tháng Mười, 2022 at 2:28 chiều
    Reply
    5) 58 – 58 x ( 6 + 54 – 60)
    = 58 – 58 x ( 60 – 60)
    = 58 – 58 x 0
    =58 – 0
    = 58
    6) 32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
    = 32 + 63 x a x ( a-a) + 32 x 8 + 32
    = 32 + 63 x a x 0 + 32 x 8 + 32
    = 32 + 32 x 8 + 32
    = 32 x ( 1 + 8 + 1)
    = 32 x 10
    = 320
    7) (1 + 2 + 3 + 4 +…………..+ 9) x ( 21 x 5 – 21 – 4 x 21)
    = ( 1+2+3+4+…………..+ 9) x [ 21 x ( 5 – 1 – 4)]
    = (1+2+3+4+……….+9) x 21 x 0
    = 0
    8) ( 9 x 7 + 8 x 9 – 15 x 9 ) : ( 1 + 3 + 5 + 7 +……….+ 17 + 19)
    = [ 9 x ( 7+8-15)] : ( 1 + 3 + 5 +…….+19)
    = (9 x 0) : ( 1+3+5+…….+19)
    = 0 : ( 1+3+5+……+19)
    = 0
    9) (2 + 4 + 6 + 8 +…………+20) x ( 56 x 3 – 72 : 9 x 21 )
    = (2+4+6+……….+20) x [ 8 x 7 x 3 – ( 72 : 9) x 21]
    = (2+4+6+…….+20) x ( 8 x 21 – 8 x 21)
    = (2+4+6+…….+20) x 0
    = 0
     

  2. tuyetnhungthu
    tuyetnhungthu
    26 Tháng Mười, 2022 at 2:28 chiều
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
    5) 58 – 58 xx ( 6 + 54 – 60 )
    = 58 – 58 xx ( 60 – 60 )
    = 58 – 58 xx 0
    = 58 – 0
    = 58
    ____________
    6) 32 + 63 xx a xx ( a xx 1 – a : 1 ) + 32 xx 8 + 32
    = 32 + 63 xx a xx 0 + 32 xx 8 + 32
    = 32 xx ( 1 + 8 + 1 )
    = 32 xx 10
    = 320 
    ___________
    7) ( 1 + 2 + 3 + 4 +………+ 9 ) xx ( 21 xx 5 – 21 – 4 xx 21 )
    = ( 1 + 2 + 3 + 4 +……+ 9 ) xx [ 21 xx ( 5 – 1 – 4 )]
    = ( 1 + 2 + 3 + 4 +…….+ 9 ) xx [ 21 xx 0 ]
    = ( 1 + 2 + 3 + 4 +……..+ 9 ) xx 0
    = 0
    ___________
    8) ( 9 xx 7 + 8 xx 9 – 15 xx 9 ) : ( 1 + 3 + 5 + 7 +………..+ 17 + 19 )
    = [ 9 xx ( 7 + 8 – 15 )] : ( 1 + 3 + 5 + 7 +………..+ 17 + 19 )
    = [ 9 xx 0 ] : ( 1 + 3 + 5 + 7 +………..+ 17 + 19 )
    = 0 : ( 1 + 3 + 5 + 7 +………..+ 17 + 19 )
    = 0 
    __________
    9) ( 2 + 4 + 6 + 8 +………+ 20 ) xx ( 56 xx 3 – 72 : 9 xx 21 )
    = ( 2 + 4 + 6 + 8 +………+ 20 ) xx ( 56 xx 3 – 8 xx 21 )
    = ( 2 + 4 + 6 + 8 +………+ 20 ) xx ( 168 – 168 )
    = ( 2 + 4 + 6 + 8 +………+ 20 ) xx 0
    = 0

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

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