6.4÷4= answer 7.5÷5= answer 12.5+0.5= answer 16×0.5= answer 1.2÷3= answer 24.8-8 = answer 7.2 ÷. Answer 1.3×0.2= answer 7.2÷0.8= answer 8×0.5= answer 2.8+8= answer 0.39÷0.03= answer 2 1÷0.3= answer.
fill (up) a vacancy
1. When calculating 19.76÷0.26, it should be calculated as () ÷ (), using the nature of ().
2. The product of two factors is 0.45, one of which is 1.2 and the other is ().
3.9.9898 ... is a decimal (), which is recorded as () in a simple way.
4.20÷3' s business simplified method is marked as () and its accuracy is ().
The expansion of 5. 0. 45 10 times is (), and the reduction of () to it 100( 1) is 0.068; 4.5 After expanding 100 times, it is more than the original number ().
6.() 1.5 times 4.8; 7.68 is () times of 0.24.
How much is half of 7.84.8? The formula is () or ().
8. A decimal, if its decimal point is shifted to the right by one place, will be 80.2 more than the original number. It turns out that this number is ().
9. fill in ">", "
48.5÷ 16○48.5 32.4÷0.45○32.4 2 10÷ 1.4○2 10 1.8×2.9○ 1.8
7.26÷ 1○7.26 0.25×3.6○3.6
10.0.25 hours = () minutes 3.75km = () meters 560kg = () tons.
The 20th digit of the quotient of 1 1.4÷7 is ().
Third, the judgment (tick right, X wrong)
1. When two numbers are divided, the quotient must be a cyclic decimal. ( )
2. Infinite decimal is greater than finite decimal. ( )
The quotients of 3.4.83÷0.7, 48.3÷7 and 483 ÷70 are equal. ( )
4.3.54545454 The cycle segment is 54. ( )
5. Similarity numbers 4.2 and 4.20 are equal in size and accuracy. ( )
6. In the division formula with remainder, the dividend and divisor are enlarged by 100 times, and the quotient remains unchanged, so does the remainder. ( )
The quotient of 7.2.8÷0.9 is 3 and the remainder is 1. ( )
4. Choose (put the serial number of the correct answer in brackets)
1. The following numbers that are not cyclic decimals are ().
A.3.89… B.3.8999… C.3.88999
2. In the following formula, the quotient is ().
a . 3.2÷0. 12 b . 3.2÷ 1.2 c . 32÷ 12
3. Three decimal places, with two decimal places reserved. The approximate value is 3.86, and the exact value may be ().
A.3.876
4. Remove the decimal point of 0.004, and the quotient of the new number and the original number is ().
100
5. The formula of quotient is ()
A.54÷0.36 B.5.4÷36 C.5.4÷0.36
6. There are () decimals greater than 0.7 and less than 0.8.
A.9 B.0 C. Countless D. 1
7.3.2727 ... is () decimal.
A. limited cyclic
8.30 points = ()
A.0.3 B.3 C.0.5
Comparison of 9.2.5÷0.0 1 and 2.5× 100 ().
A. Larger quotient B. Larger product C. Equality
10. The number obtained by multiplying a decimal by three times is 7.2 larger than the original number, and the original decimal is ().
A.2 1.6
Verb (abbreviation for verb) calculation
Vertical calculation
78 ÷ 4 = 48 ÷ 15 = 1.75 ÷ 35 = 1 1.9 ÷ 1.7 = 0.02 ÷ 0.25 = 4.2 ÷.
Sixth, solve practical problems.
1. The blue whale weighs about 126 tons, and the elephant weighs about 5 tons. How many times does the blue whale weigh?
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Lin li weighed 3.25kg at birth and 7.2kg three months later. How many kilograms does lin li gain on average every month?
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(1) A ship travels 50 kilometers per hour on average. How many hours does it take from Nanjing to Shanghai?
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(2) What other questions can you ask?
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The area of a lawn is 504 square meters and the width is 48 meters.
(1) How long is the lawn?
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(2) If the width increases by 15m, how much will the area increase?
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