Math diary [2007-12-1621:10: 00 | by: sunshine in winter]165438+1Sunday, October 25th, if released.
If you add an inconspicuous decimal point to "456", it will also become "4.56" or "45.6" ... The decimal point is such a magical symbol that all numbers can be "tiny"! Unit 7, we learned the multiplication and division of decimals, which made me feel deeply! The first point: when the lines are vertical, the numbers should be aligned. When column multiplication is vertical, many students often mistakenly think that integers are aligned with integers and decimals are aligned with decimals. If you do that, it's all wet! The correct method should be this: No matter where the decimal point is, when the column is vertical, the ends of the two numbers must be aligned. Only the results and answers calculated in this way are correct! The second point: Never point the decimal point in the process of vertical column.
This is a common problem of many students. When you click the decimal point in the exam, you will be deducted, and you will regret it! Number three: Be careful. Multiply a decimal by 10, 100, 1000 ... or divide a decimal by 10, 100, 1000 ... Never make a mistake about the position and direction of the decimal point! Let's study math seriously! There are still many secrets waiting for us to explore in the kingdom of decimals! .
What is written on the handwritten newspaper divided by the score?
The former term of the ratio is equivalent to numerator, the latter term of the dividend ratio is equivalent to denominator, the divisor ratio is equivalent to the value of fraction, and the quotient of the division formula is 1. Connection: in a fraction, the numerator is equivalent to the dividend in the division formula, the denominator is equivalent to the divisor, the fractional line is equivalent to the divisor, and the fractional value is equivalent to the quotient; Put the fraction in the "ratio", the numerator is equivalent to the former term, the denominator is equivalent to the latter term, the fractional line is equivalent to the comparison symbol, and the fractional value is equivalent to the ratio; The former term of the ratio is equivalent to the dividend in division, the latter term is equivalent to the divisor in division, and the ratio is equivalent to the quotient in division.
2。 Difference: the score is a number; Division is an operation between numbers; Proportion is a relationship.
Decimal multiplication and division handwritten newspaper
Math diary [2007-12-1621:10: 00 | by: sunshine in winter]165438+1Sunday, October 25th, if released.
If you add an inconspicuous decimal point to "456", it will also become "4.56" or "45.6" ... The decimal point is such a magical symbol that all numbers can be "tiny"! Unit 7, we learned the multiplication and division of decimals, which made me feel deeply! The first point: when the lines are vertical, the numbers should be aligned. When column multiplication is vertical, many students often mistakenly think that integers are aligned with integers and decimals are aligned with decimals. If you do that, it's all wet! The correct method should be this: No matter where the decimal point is, when the column is vertical, the ends of the two numbers must be aligned. Only the results and answers calculated in this way are correct! The second point: Never point the decimal point in the process of vertical column.
This is a common problem of many students. When you click the decimal point in the exam, you will be deducted, and you will regret it! Number three: Be careful. Multiply a decimal by 10, 100, 1000 ... or divide a decimal by 10, 100, 1000 ... Never make a mistake about the position and direction of the decimal point! Let's study math seriously! There are still many secrets waiting for us to explore in the kingdom of decimals! .