Question

170+180+190+200+210+220=???

Answer 1

170+180+190+200+210+220

=(180+220)+(190+210)+200+170

=400+400+200+170

=1170

Answer 2

170+180+190+200+210+220

=350+390+430

=740+430

=1170

Answer 3

170 + 180 + 190 + 200 + 210 + 220

= ( 180 + 220 ) + ( 190 + 210 ) + 200 + 170

= 400 + 400 + 200 + 170

= 400 x 2 + 200 + 170

= 800 + 200 + 170

= 1000 + 170 

= 1170

= 

Answer 4

170 + 180 + 190 + 200 + 210 + 220

= ( 170 + 220 ) + (180 + 210 ) + ( 190 + 200 )

=         390      +       390        +        390

= 390 x 3 = 1170

Answer 5

170 + 180 + 190 + 200 + 210 + 220

= 170 + 200 + 180 + 220 + 190 + 210

= ( 170 + 200 ) + ( 180 + 220 ) + ( 190 + 210 )

= 370 + 400 + 400

= 1170

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