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

Toán Lớp 5: a) 15,27 – 4,18 – 2,09 b) 60 – 26,75 – 13,25 c) 38,25 – 18,25 + 21,64 – 11,64 + 9,93 d) 45,28 + 52,17 – 15,28 – 12,17 e) ( 72,69 + 18,4

Toán Lớp 5: a) 15,27 – 4,18 – 2,09
b) 60 – 26,75 – 13,25
c) 38,25 – 18,25 + 21,64 – 11,64 + 9,93
d) 45,28 + 52,17 – 15,28 – 12,17
e) ( 72,69 + 18,47) – ( 8,47 + 22,69)
tính bằng cách thuận tiện

Comments ( 2 )

  1. Giải đáp:
    a,15,27−4,18−2,09
    =15,27−(4,18+2,09)
    =15,07−6,27
    =8,8
    =60−(26,75+13,25)
    =60−40
    =20
    =(38,25−18,25)+(21,64−11,64)+9,93
    =20+10+9,93
    =39,93
    =(45,28−15,28)+(52,17−12,17)
    =30+40
    =70
    =72,69+18,47−8,47−22,69
    =(72,69−22,69)+(18,47−8,47)
    =50+10
                                    CHO MÌNH CÂU TRẢ LỜI HAY NHẤT NHA . CẢM ƠN NHIỀU 
     

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     $a,15,27-4,18-2,09$
    $=15,27-(4,18+2,09)$
    $=15,07-6,27$
    $=8,8$
    $b,60-26,75-13,25$
    $=60-(26,75+13,25)$
    $=60-40$
    $=20$
    $c,38,25-18,25+21,64-11,64+9,93$
    $=(38,25-18,25)+(21,64-11,64)+9,93$
    $=20+10+9,93$
    $=39,93$
    $d,45,28+52,17-15,28-12,17$
    $=(45,28-15,28)+(52,17-12,17)$
    $=30+40$
    $=70$
    $e,(72,69+18,47)-(8,47+22,69)$
    $=72,69+18,47-8,47-22,69$
    $=(72,69-22,69)+(18,47-8,47)$
    $=50+10$
    $=60$
    (Bài tham khảo)

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