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

Toán Lớp 6: h, 13,23 + 13,45 + 13,32 i,47,49 +47,53-47,2 j,37,12+37,87+37 k,48,23+48,78-48 I,25,5*4,27*2 m,28,64+28,36 n,87,36+87,64 o,20+21+22+…

Toán Lớp 6: h, 13,23 + 13,45 + 13,32
i,47,49 +47,53-47,2
j,37,12+37,87+37
k,48,23+48,78-48
I,25,5*4,27*2
m,28,64+28,36
n,87,36+87,64
o,20+21+22+……+29+30

Comments ( 2 )

  1. H, 13,23 + 13,45 + 13,32 = 40
    I,  47,49 +47,53-47,2 = 94
    J,  37,12+37,87+37 = 111,99
    K, 48,23+48,78-48 = 49,01
    L,  25,5 x 4,27 x 2 = 213.927
    M, 28,64+28,36 = 57
    N, 87,36+87,64 = 175
    O, 20+21+22+……+29+30 = (30 – 20 + 1) : 2 x (30 + 20) = 275  

  2.  
    Lời giải và giải thích chi tiết:
    h, 13,23 + 13,45 + 13,32
    =(13,23+13,32)+13,45
    =26,55+13,45
    =40
    i,47,49 +47,53-47,2
    =95,02-47,2
    =47,82
    j,37,12+37,87+37
    =74,99+37
    =111,99
    k,48,23+48,78-48
    =97,01-48
    =49,01
    I,25,5 x 4,27 x 2
    = 213.927
    m,28,64+28,36
    = 57
    n,87,36+87,64
    = 175
    o,20+21+22+……+29+30 
    =(20+30)+(21+29)+(22+28)+(23+27)+(24+26)+25
    =50 x 5 +25
    =250 +25
    =275

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