Theo mk là làm kiểu này :
a, -12 . 35 + 4. 52 . 3 - 12 . 117
= -12 . 35 + 4 . 3 . 52 + -12 . 117
= -12 . 35 - -12 . 52 + -12 . 117
= -12 . \((\)35 - 52 + 117 \()\)
= -12 . 100
= -1200
a, -12 . 35 + 4 . 52 . 3 - 12 . 117
= -12.35+12.52-12.117
=12.(-35+52-117)
b, -134 + 51 . 134 - 134 . 48
= -134 + 134 . \((\)51 - 48 \()\)
= -134 + 134 . 3
= -134 - -134 . 3
= -134 . \((\)3 - 1 \()\)
= -134 . 2
= -268
a, - 12 . 35 + 4 . 52 . 3 - 12 . 117
= 12. ( - 35 + 52 - 117 )
= 12 . ( - 100 )
= - 1200
b, - 134 + 51 . 134 - 134 . 48
= 134.( - 1 + 51 - 48 )
= 134.2
= 268
a) -12.35+4.52.3-12.117 b)-134+51.134-134.48
=12.-35+4.3.52-12.117 =134.(-1+51-48)
=12.-35+12.52-12.117 =134.2
=12.(-35+52-117) =268
=12.-100
=-1200