1. Fill in the blanks (65438+ 0 for each blank, *** 15)
1. There are () days in February in a normal year and () days in a leap year.
2. October has () weeks and () days.
There are () days in January, February and March in normal years.
4. Extracurricular group activities begin at 16 hours and end at 1 hour for 20 minutes, and the time for the activities to end is () hours () minutes.
Xiaoming goes to school at 8: 30 every day and comes home from school at 1 1: 50. His time at school in the morning is ().
6. The business hours of a store are 8: 00- 19: 00 all day. 19: 00 here means () pm, and the store is open all day () hours.
7. What can I fill in the following ()?
194×()& lt； 1224 24 1×()& lt； 2300 254×()& lt； 1400
8. Multiply two numbers. If both factors are expanded by 10 times, the product is expanded by () times.
9, 3057000 is written as (), and the mantissa after omitting ten thousand is () ten thousand.
10. Omit the mantissa of the following figures as required, and write down their approximate numbers.
The divisor of 5389 1 written by the mantissa after omitting thousands is (); Omitting the mantissa after ten thousand, write that the divisor of 347 168 is ().
The quotient of 1 1 and 3560÷20 is () digits.
Second, write directly the number of the following questions.
520+480 = 670-500 = 650,000+470,000 =
500 -240= 437+ 163= 820- 560=
34 ×200= 25× 300= 3600÷ 300=
8400÷ 600= 1900+ 5400= 2300- 800=
27×4×5= 35×5×2= 25×24=
360÷8÷5=
Third, calculate the following questions vertically.
850 1+53799+2240= 1800×630= 86509-4736=
296×304= 28300÷4 1= 65 100÷2 10=
648×350= 8450÷32=
Fourth, off-type calculation.
( 1)2970÷(250 × 12- 299 1) (2) 15× 142 1÷(573 -566)
(3)64×(720+ 650÷ 130) (4) 1 18+ 153÷ 17×9
5. Column calculation.
What is the difference between the product of (1) 14 and 72 and the quotient obtained by dividing 900 by 3?
(2) What is the quotient of the sum of 78 and 82 divided by the difference between 585 and 265?
(3) The number A is 34507, which is less than the number B 10895. What is the number B?
(4) What is the sum of 86 plus 590 and 900 minus 75 times?
(5) What is the sum of the quotient of 5292 divided by 36 multiplied by the difference between 1370 and 1080?
Six, use the rounding method to find the divisor.
(1) The following figures are probably hundreds.
584 678 325 832 794 109
(2) The following figures are in the thousands.
(3) Omit the mantissa after the highest bit and find the divisor.
28 206 780 1032 550 1 980
Seven, judge the following questions.
(1) Total price multiplied by unit price in quantity () (2) 5 divided by 0 equals 0 ().
(4) One factor is expanded by 10 times, and the other factor is also expanded by 10 times, and its product is also expanded by 0 times.
(5) When two numbers are divided, the dividend remains unchanged, and the divisor is reduced by 10 times, and the quotient remains unchanged ().
(6) The number divided by each time must be less than the divisor ().
Eight, application questions.
(1) I hope that the primary school will build a 200-meter runway. Has been built160m. How many times have you repaired it?
(2) A road team built 384 meters of roads in 6 hours. According to this calculation, if it is repaired for another 8 hours, how many meters will it take to build the road?
(3) The school bought five basketballs and five volleyballs, the basketball cost 245 yuan, and the volleyball 1 15 yuan. How much is basketball more expensive than volleyball?
(4) Two teams of road builders jointly build roads, which can be completed in four days. Team a repairs 60 meters every day, and team b repairs it for three days 150 meters. How long is this road?
(5) Our school does morning exercises at 8: 00 and finishes school at 1 1: 50, and starts classes at 15: 00 in the afternoon and finishes school at 17: 30. How many hours is the class time on this day?
(6) Orchard workers prune fruit trees, and each person can prune eight trees every day. According to this calculation, how many trees can seven people prune in three days?
(7) The maximum daily temperatures measured by the meteorological team are 30, 365, 438+0, 33, 32, 29, 32 and 30 degrees Celsius respectively. What is the average maximum temperature this week?
Can you solve your problem?