Question by Hương Yêu Dấu - Discuss with MathYouLike

Hương Yêu Dấu

29/10/2017 at 07:48

10+20+30+40+50+60+70+80+90=?

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I like Math English 29/10/2017 at 07:50

10+20+30+40+50+60+70+80+90=

=(10+90)+(20+80)+(30+70)+(40+60)+50

=100+100+100+100+50

=450
Hương Yêu Dấu selected this answer.
Trần Quỳnh Anh 28/12/2017 at 13:14

10+20+30+40+50+60+70+80+90

=(10+90)+(20+80)+(30+70)+(40+60)+50

=100+100+100+100+50

=100.4+50

=400+50

=450
Detecvite Conan 29/10/2017 at 09:16

10+20+30+40+50+60+70+80+90

=10+90+20+80+30+70+40+60+50

=(10+90)+(20+80)+(30+70)+(40+60)+50

=100+100+100+100+50

=450
Công Đinh 30/10/2017 at 18:46

10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90

= ( 10 + 90 ) + ( 20 + 80 ) + ( 30 + 70 ) + ( 40 + 60 ) + 50

= 100 + 100 + 100 + 100 + 50

= 100 . 4 + 50

= 400 + 50

= 450

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