1, the divisor is the fractional division of an integer. According to the division rule of (), the decimal point of quotient should be aligned with the decimal point of (). If there is a remainder at the end of the dividend, add () after the remainder to continue the division.

2. When taking the approximate value of quotient, divide by () more than the decimal places to be reserved, and then omit the mantissa by "()" method.

3. The dividend and divisor are expanded at the same time 100 times, and the quotient ().

4.0.7 A few tenths and a few percent.

5, 7.986 accurate to ten is (); Keep two decimal places is ().

6. When calculating 4.56÷0.03, it should be calculated as () ÷ (), and the result is ().

7.0.3856856 ... is a decimal (), and the cycle segment is (). Write () with simple notation, and keep three decimal places about ().

8. The quotient of the following question is less than 1. Draw "√" below.

19.5÷6 29.76÷62

( ) ( )

53.4÷ 12 60÷75

( ) ( )

9. Fill in ">" in (). Or "

3.45÷0.99 ( )3.45 1.88÷ 1.0 1( ) 1.88 8 1÷ 1.5( )54 9.8÷0. 12( )9.8 6.75÷25( ) 1 0.375÷2.4( )3.75÷24

10, three decimal places are accurate to 1%, and the approximate value is 3.80. The smallest three decimal places may be () or ().

Second, judge, hit "√" for the right and "×" for the wrong.

1, the dividend is divided by 10. In order to keep the quotient unchanged, the divisor should be expanded by 10 times. ( )

2. 84÷0.0 1 actually expands 84 to the original 100 times. ( )

3. Infinite decimal must be greater than finite decimal. ( )

4.0.66666 is a cyclic decimal. ( )

When 5,5.6 is divided by a decimal, the quotient must be greater than 5.6. ( )

The quotient of 6.3.83÷0.7, 38.3÷7 and 383 ÷70 is equal. ( )

Third, write the number directly.

6÷5= 0.2÷0.4=

1.6÷0.8= 4.2÷2. 1=

0.2×0.6= 4.6÷0.46=

0.52÷52= 7. 1÷0. 1=

3.9÷ 13= 3.6÷ 12=

8. 1÷27= 2÷0.04=

Fourth, vertical calculation (keep the decimal point).

18÷24 43.68÷26

25.3÷0.88 0. 1575÷3. 15

78.6÷ 1 1 16.787÷0.28