Question

what is 1+2+3+4+5+6+7+8+9+10 dont use calculator​

Answer 1

Answer:

55

Step-by-step explanation:

1+2=3, 3+3=6, 6+4=10, 10+5=15, 15+6=21, 21+7=28, 28+8=36, 36+9=45, 45+10=55

done using human calculator me myself

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