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

Toán Lớp 4: Tính nhanh các biểu thức sau : a) ( 45 – 5 x 9 ) x 1 x 2 x 3 x 4 x 5 x 6 x 7 b) ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) x ( 72 – 8

Tháng Sáu 29, 2022 Toán học 2 Comments 0 views

Toán Lớp 4: Tính nhanh các biểu thức sau : a) ( 45 – 5 x 9 ) x 1 x 2 x 3 x 4 x 5 x 6 x 7 b) ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) x ( 72 – 8 x 8 – 8 ) c) ( 36 – 4 x 9 ) : ( 3 x 5 x 7 x 9 x 11 ) d) (27 – 3 x 9) : 9 x 1 x 3 x 5 x7

Comments ( 2 )

  1. lantrungbach
    lantrungbach
    29 Tháng Sáu, 2022 at 1:03 sáng
    Reply
    a ) (45 – 5 xx 9 ) xx 1 xx 2 xx 3 xx 4 xx 5 xx 6 xx 7
    = (45 – 45 ) xx 1 xx 2 xx 3 xx 4 xx 5 xx 6 xx 7
    = 0 xx 1 xx 2 xx 3 xx 4 xx 5 xx 6 xx 7
    = 0
    b ) ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) xx ( 72 – 8 xx 8 – 8 )
    = ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) xx ( 72 – 64 – 8 )
    = ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) xx 0
    = 0
    c ) ( 36 – 4 xx 9 ) : ( 3 xx 5 xx 7 xx 9 xx 11 )
    = ( 36 – 36 ) : ( 3 xx 5 xx 7 xx 9 xx 11 )
    = 0 : ( 3 xx 5 xx 7 xx 9 xx 11 )
    = 0
    d ) ( 27 – 3 xx 9 ) : 9 xx 1 xx 3 xx 5 xx 7
    = ( 27 – 27 ) : 9 xx 1 xx 3 xx 5 xx 7
    = 0 : 9 xx 1 xx 3 xx 5 xx 7
    = 0
    #dtkc

  2. diemmyhoa
    diemmyhoa
    29 Tháng Sáu, 2022 at 1:03 sáng
    Reply
    a) ( 45 – 5 × 9 ) × 1 × 2 × 3 × 4 × 5 × 6 × 7
    = ( 45 – 45 ) × 1 × 2 × 3 × 4 × 5 × 6 × 7
    = 0 × 1 × 2 × 3 × 4 × 5 × 6 × 7
    = 0
    b) ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) × ( 72 – 8 × 8 – 8 )
    = ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) × ( 72 – 64 – 8 )
    = ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) × 0
    = 0
    c) ( 36 – 4 × 9 ) ÷( 3 × 5 × 7 × 9 × 11 )
    = ( 36 – 36 ) ÷( 3 × 5 × 7 × 9 × 11 )
    = 0 ÷ ( 3 × 5 × 7 × 9 × 11 )
    = 0
    d) (27 – 3 × 9) ÷ 9 × 1 × 3 × 5 × 7
    = (27 – 27) ÷ 9 × 1 × 3 × 5 × 7
    = 0 ÷ 9 × 1 × 3 × 5 × 7
    = 0

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

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