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

Toán Lớp 5: bài 1: tính bằng cách thuận tiện nhất nếu có thể: (2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 1 + 1/3 – 4/3) trả lời nhanh ctl hay nh

Toán Lớp 5: bài 1: tính bằng cách thuận tiện nhất nếu có thể: (2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 1 + 1/3 – 4/3) trả lời nhanh ctl hay nhất

Comments ( 2 )

  1. (2013 × 2014 +2014 ×2015 + 2015 ×  2016) × ( 1 +1/3 -4/3)
    = (2013 × 2014 +2014 ×2015 + 2015 ×  2016) × ( 3/3 + 1/3 -4/3)
    = (2013 × 2014 +2014 ×2015 + 2015 ×  2016) × ( 4/3 – 4/3)
    = (2013 × 2014 +2014 ×2015 + 2015 ×  2016) × 0
    = 0

  2. ( 2013 xx 2014 + 2014 xx 2015+ 2015 xx 2016) xx ( 1 + 1/3 – 4/3)
    =( 2013 xx 2014 + 2014 xx 2015+ 2015 xx 2016) xx ( 3/3 + 1/3 – 4/3)
    = ( 2013 xx 2014 + 2014 xx 2015+ 2015 xx 2016) xx ( \frac{3 + 1 – 4}{3})
    = ( 2013 xx 2014 + 2014 xx 2015+ 2015 xx 2016) xx 0
    = 0

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

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