Question

Tính hợp lí: a) (-418)-{-218-[100-(318+2012)]}

b) (351-875)-(125-149)

Giúp mik với nha yêu mn

Answer 1

a,(-418)-{-218-[100-(318+2012)]}

=(-418)-{-218-[100-2330]}

=(-418)-{-218-(-2230)

=(-418)-{-218+2230}

=(-418)-2012

= -2430

b,(351-875)-(125-149)

=(-424)-(-24)

=(-424)+24

= -400

Answer 2

a)(-418)-{-218-[100-(318+2012)]}

= -418+218-100+318+2012

=(-418-100)+(218+2012)+318

= -318+2230+318

=[(-318)+318)+2210

=0+2230

=2230

b) (351-875)-(125-149)

=351-875-125+149

=(351+149)-(875+125)

=500-1000

=-500

học tốt nhé

Answer 3

a,=-418-{-218-[100-318-2012]}

=418-{-218-100+318+2012}

=418+218+100-318-2012

=(418-318)+(100+218+2012)

=100+2330

=2430

b,(351-875)-(125-149)

=351-875-125+149

=(351+149)-(875+125)

=500-1000

=-500

Answer 4

a) 2430

b) -500