Thinking of solving problems: this is a problem in the mathematics part of the first grade of primary school. This paper mainly investigates the understanding of numbers within 100. If you count 100 1, it is 100. If the number is 1 10, dozens of 10 are 100.

Extended data

1. To know the numbers within 100, we should know the counting units "one", "ten" and "hundred", know the numbers and their order, understand the meanings of numbers, ten and hundred in the unit, and master the composition of numbers.

2. Number recognition: from the right, the first number is one, the second number is ten, and the third number is one hundred; One in hundreds means hundreds, one in tens means ten, and one in digits means one.