40+1 39+2 38+3 37+4 36+5 35+6 34+7 33+8 32+9 31+10 30+11 29+12 28+13 27+14 26+15 25+16 24+17 23+18 22+19 21+20 20+21 19+22 18+23 17+24 16+25 15+26 14+27 13+28 12+29 11+30 10+31 9+32 8+33 7+34 6+35 5+36 4+37 3+38 2+39 1+40 These are all operations with natural numbers. More complicated operations look like these: 23,5+17,5 = 41 -1+42 = 41 etc...
... equals an even number
Yes, the sum is always rational.
2+n
70
[ y = 2x plus or minus any number ] is parallel to it. [ y = -0.5x plus or minus any number ] is perpendicular to it.
30 and 41
At 41. In other words... 10 plus 31 equals 41 !
15 + 41 + 23 = 79
.41 + 21.4 + 6.3 + 280 = 308.11
41
72 !
Instead of -25 plus - 16, think of it as -25 - 16. 25 mins 16 equals -41.
A = 4
41
41 = Thieves plus Ali Baba
yes. -41+20=-21
41 plus 3 equals 44. You add the two numbers together to get the answer.