A bag of ten pieces can hold six bags, and the remaining seven pieces can hold one bag, making a total of seven bags.

This should be an exercise in Unit 4 of Grade One Mathematics of People's Education Press. The knowledge points in Unit 4 are as follows:

I. Counting and its composition

1. You can have one land number, two land numbers, five land numbers and ten land numbers.

2. Composition of numbers within100: from the right, the first digit is one digit, the second digit is ten digits, and the third digit is one hundred digits.

(1) a number, including several1; What is the number of tens? It means how many tens there are. On the contrary, there are several 1 in this number, and how many digits are there; How many tens are there? How many are the top ten?

(2) When a number is represented by a counter, the number of beads on each digit of the counter corresponds to the number on the single digit, the tenth digit and the hundredth digit of this number.

Second, the number of reading and writing

Both reading and writing start from a high position. Use Arabic numerals when writing numbers,

Use Chinese characters when reading. When writing numbers, when there are no beads on one or ten digits of the counter, write "0" as a placeholder.

2. Use "much more, much less, much less" to describe the relationship between two numbers.

Third, the comparison of numbers.

1. How to compare the size of two digits: look at the ten digits first, which one is larger. If the ten digits are the same, look at one digit, which number is larger, it will be larger.

Fourth, solve the problem.

1. "How many strings can you wear" problem: Use the composition of circles or numbers to solve this kind of problem.

2. Integer decimal plus one digit and corresponding subtraction.