1, find the total:
When we find the sum of all the elements in a set, we use addition to calculate. For example, if we have three apples, four oranges and five bananas, we can add all the fruits together and get the total: 3+4+5= 12. In mathematical problems, sometimes more complicated situations are involved, such as the number of items, the addition of numbers and so on. But the basic calculation method is the same, just add up all the figures.
2. Find the parts:
When we find the sum of some elements in a set, we also use addition to calculate. For example, if we have five apples, two of which are red and three are green, and we want to know the number of red apples, then we just need to add up the red apples: 2+3=5. When solving the problem of finding parts, we need to determine which elements belong to the set we need before adding them.
It is very important for freshmen to understand the basic addition operation and be skilled in calculation, whether it is to find the total or the part. Through a lot of practice and repeated practice, students can gradually master these basic math skills.
Skills of learning mathematics in the first grade;
1. Establish a sense of numbers: feel the concept of numbers through the number, shape and size of objects in daily life, such as index by hand, comparative size, etc.
2. Learn to classify: classify items according to their different characteristics, such as color and shape; Sort numbers by size, such as from small to large or from large to small.
3. Know basic graphics: Learn to know basic graphics such as squares, rectangles and circles, and be able to identify and distinguish them.
4. Mastering addition and subtraction: Learn addition and subtraction by operating objects or using teaching AIDS, such as using fingers or sticks to calculate.
5. Pay attention to practical application: apply the learned mathematical knowledge to real life, such as calculating simple shopping amount and comparing prices.