Main idea of this topic: A drives a flock of sheep to find dense grassland, and then B follows with a fat sheep. B asked A, "Did you catch 100 sheep?" A replied, "My sheep is not 100. If you add the number of sheep I have now, plus half of the existing sheep, plus half of the existing sheep, plus a sheep you are leading, it is exactly 100. Please guess how many sheep I have now? "
Solution1:(100-1) ÷ (1+0+2/1)
=99÷ 1 1/4
=99×4/ 1 1
= 36 (only)
Solution 2: x+x+2/1x+4/1x+1=100.
2 .4/3x= 100- 1
X=99×4/ 1 1
X=36
A: There are 36 sheep.