Calculation: minus one and three-thirds plus two and two-thirds minus three and three-thirds plus four and two-thirds Minus 5 and 1 / 3 to add 1992 and 1 / 2

Calculation: minus one and three-thirds plus two and two-thirds minus three and three-thirds plus four and two-thirds Minus 5 and 1 / 3 to add 1992 and 1 / 2

Minus 1 and 3 / 1 plus 2 and 2 / 1 minus 3 and 3 / 1 plus 4 and 2 / 1
=(minus 1 / 3 minus 3 / 3) plus (2 / 2 plus 4 / 2)
=-4 and 2 / 3 + 7
=Two and one-third
Minus 5 and 1 / 3 to add 1992 and 1 / 2
=(1992-5) + (1 / 2-1 / 3)
=1987 + 1 / 6
=One sixth of 1987

2 / 9 + 1 / 2 off form calculation + checking calculation 6 / 7-2 / 3

2/9+1/2
=4/18+9/18
=13/18
checking calculation
13/18-2/9=13/18-4/18=1/2
6/7-2/3
=18/21-14/21
=4/21
checking calculation
4/21+2/3=4/21+14/21=6/7
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Calculate the second power of 2 plus 2 plus the third power of 2 plus the third power of 2 plus the n power of 2

Let s = 2 + 2 ^ 2 + 2 ^ 3 +.. + 2 ^ n
2s=2^2+2^3+2^4+.+2^(n+1)
2s-s=2^(n+1)-2
s=2^(n+1)-2

1 / 3-1 / 5 off form calculation + checking calculation

1/3-1/5
=5/15-3/15
=2/15
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