254×5=; 240×6=; 46 1×9=; 805×9=; 752×2=; 452×8=; 152×2=; 569×8=; 458×6=; 1 1 1×5=; 666×5=; 789×3=; 856×8=; 652×8=; 362×4=; 168×2=; 185×3=; 264×2=; 176×3=; 196×3=; 156×4=; 356×4=; 360×7=; 365×9=;
Expand knowledge:
1, oral expression ability is the basis of learning mathematics well.
Mathematics is a profound subject, not simply "123", but a subject that studies many concepts such as quantity, structure, information and space, and is a means for people to describe and deduce things abstractly.
The basis of this series of operations is actually oral ability. If the child's oral expression ability is poor, then the progress in mathematics will be slow, or even mathematics will not be learned at all.
2, the misunderstanding of training oral arithmetic ability.
As the saying goes, "A hundred trials make a steel", so the first way that Song Tian's mother thought of was to let Song Tian practice oral arithmetic a lot. Indeed, doing a lot of exercises is very effective in improving children's language ability. After all, "Practice makes perfect". However, the premise is that children are willing to do a lot of exercises and have no resistance.
Songta is such a child. He is not stupid, but his language ability is poor. Therefore, every time Songta is in the exam, there are often cases where you can't finish the questions. Usually, when doing class homework and homework, Songta is also very procrastinating.
3. Guide children to understand and master language skills.
The skill of oral calculation is actually a basic knowledge of mathematical calculation. For example, the method of adding ten, the method of decomposition, the formula of 1999 addition, subtraction, multiplication and division, the size of numbers, borrowing and so on. This knowledge seems to be childish to adults, but it plays an important role in improving children's language ability.
If these are not mastered skillfully, then the child's oral arithmetic level will be very poor. Mastering basic knowledge not only requires children to study hard at school, but also needs children to consolidate in their spare time.