Toán Lớp 6: bài 3.20:SBT trang 54
a,(-28) + ( -35) – 92 + (-82)
b,15-(-38)+(-55)-(-47)
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Toán Lớp 6: bài 3.20:SBT trang 54
a,(-28) + ( -35) – 92 + (-82)
b,15-(-38)+(-55)-(-47)
Comments ( 2 )
$=-28-35-92-82$
$=-(28+35+92+82)$
$=- ( 237 ) = -237$
$b,15-(-38)+(-55)-(-47)$
$=15+38-55+47$
$=(15+38+47)-55$
$=100 -55=45$