數學問題1條

1-10 ~11 number
11-20 ~20
21-30 ~20
31-40 ~20
41-50 ~20
51-60~ 20
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111 number
(6+1+6+2+6+3+6) ~7 number ...............111+7=118 number

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1+2+3+4+..........+10 = 55

1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0
=(1x9)+1+2+3+4+........+9+(2+0)
=9+45+2
=56

(2x9)+1+2+3+4+.......+9+(3+0)
=18+45+3
=66

(3x9)+1+2+3+4+........+9+(4+0)
=27+45+4
=76

(4x9)+1+2+3+4+........+9+(5+0)
=86

(5x9)+1+2+3+4+.......+9+(6+0)
=96

6+1+6+2+6+3+6
=(6x4)+1+2+3
=24+6
=30

56+66+76+86+96+30
=(50+60+70+80+90)+(6X5)+30
=350+30+30
=410
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Answer is 410