2. Decimal divided by decimal: Method: Enlarge the same multiple at the same time. For example: 27.23÷0.07=
So that means the dividend is 2723 and the divisor is 7. As long as we find 2723÷7, we will get the result of 27.23÷0.07.
Partial summary
Divider is the division of decimals: ① Move the decimal point of divisor to make it an integer; (2) The decimal point of the divisor is shifted to the right by several digits, and the decimal point of the dividend is also shifted to the right by several digits (the digits are not enough, and the end of the dividend is supplemented by "0"); (3) Calculate the division according to whether the divisor is an integer or a decimal.
2. Decimal division skills
Using the invariance of quotient, the divisor is changed into an integer, and the dividend is expanded by the same multiple. Then according to the method that the divisor is an integer, the decimal point of the divisor is aligned with the decimal point of the quotient.
Find the approximate value of quotient
Divide to the last place of the required reserved digits as required. The quotient invariance can be used to simplify the calculation and estimate the fractional division. Variation law of dividend, divisor and quotient: dividend and divisor expand (shrink) by the same multiple at the same time, and the quotient remains unchanged.
The divisor is constant, how many times the dividend is expanded (reduced) and how many times the quotient is expanded (reduced). The dividend is constant, how many times the divisor is expanded (reduced), and how many times the quotient is reduced (expanded). When the divisor is greater than 1, the quotient is less than the dividend. (Dividend ≠0)
When the divisor is less than 1, the quotient is greater than the dividend. (Dividend ≠0) When the divisor is equal to 1, the quotient is equal to the dividend. Have you learned the above methods?