The analysis process is as follows: for example, it is convenient to explain.
Known series: 1, 2, 3, 4, 5, 6, 7, 8, 9. The last count is 9, 8, 7, 6, 5, 4, 3, 2, 1. This counting method is reversed. So this mathematical term is reciprocal.
Extended data:
Other math noun crossword puzzles (the last one is the answer):
0 1, the power of the people (to use a mathematical noun) is infinite.
02. Make a mistake in account number (mathematical term).
03, the head of state when accounting (a mathematical term) statistics.
04, make a clean break (hit a mathematical term) score
05. Calculate the number of shafts of the rotating rod (guess the mathematical term 1)
06. When the wind stops, Liu Lian Jing (guess the mathematical term 1) is vertical.
07, fifty cents a trip (guess math noun one) and one yuan twice.
08, Zhu Yuanzhang ascended the throne (guess the mathematical term 1) disappeared.
09. Height (guess the mathematical term 1) solid geometry.
10, just right (guess the mathematical term 1) exact value.