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

Toán Lớp 6: Bài 1: a) 2763 + 152 b) (-35) + (-9) c) (-7) + (-14) d) (-5) + (-248) e) (-23) + 105 f) 78+ (-123) g) (-2) +7 + (-12) +17 + (-22) +27

Toán Lớp 6: Bài 1: a) 2763 + 152
b) (-35) + (-9)
c) (-7) + (-14)
d) (-5) + (-248)
e) (-23) + 105
f) 78+ (-123)
g) (-2) +7 + (-12) +17 + (-22) +27
h) 1+ (-6) +11+ (-16) +21+ (-26)

Comments ( 2 )

  1. $a)2763+152$
    $= 2915$
    $b)(-35)+(-9)$
    $= -44$
    $c)-7+(-14)$
    $= -21$
    $d)-5+(-248) $
    $=-253$
    $e)-23+105$
    $=82$
    $f)78+(-123)$
    $=-45$
    $g) (-2) +7 + (-12) +17 + (-22) +27$
    $=[(-2) +7] +[ (-12) +17] +[ (-22) +27]$
    $=5+5+5$
    $=15$
    $h)1+ (-6) +11+ (-16) +21+ (-26)$
    $=[1+ (-6) ]+[11+ (-16) ]+[(-21)+ (-26)]$
    $=-5+(-5)+(-5)$
    $=-15$
     

  2. a)2763+152
    =2915
    b)(-35)+(-9)
    =-44
    c)-7+(-14)
    -21
    d)-5+(-248) 
    =-253
    e)-23+105
    =82
    f)78+(-123)
    =-45
    g) (-2) +7 + (-12) +17 + (-22) +27
    =[(-2) +7] +[ (-12) +17] +[ (-22) +27]
    =5+5+5
    =15
    h)1+ (-6) +11+ (-16) +21+ (-26)
    =[1+ (-6) ]+[11+ (-16) ]+[(-21)+ (-26)]
    =-5+(-5)+(-5)
    =-15

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