8 1÷3= 30× 17= 3900÷30=

89+34+ 1 1= 25×9×8= 47+ 103=

12×700= 150×4= 340-99=

320-98= 6+2+4+8= 98×25=

490÷70= 45× 10 1= 600×2=

36- 18- 12= 0÷72= 0×32=

0+49= 53-0=

Fill in the blanks (each blank 15, 1)

65,438+39,760,000 yuan is written in (), and the mantissa after omitting "ten thousand" is () ten thousand.

259.52 billion yuan is written in (), and the mantissa after omitting "one billion" is about () billion.

3.4800 cm = () decimeter = () meter

4.5080kg = () tons () kg

5.8 kg 60 g = () g

6. () is called addition.

7. Calculate (35+49)÷(63-57), first calculate (), then calculate ().

The basis of 8.73+93+27=73+27+93 is ().

99 □ 7.856 million yuan, with □ () being the closest to 900 million yuan and () being the closest to 65.438+0 billion yuan.

Three. Judgment (mark "√" for the right and "×" for the wrong) (6 points)

1.0 is divided by any number to get 0. ()

2.9 1 is divisible by 7. ()

3.45 1-99=45 1- 100- 1=350.( )

4. The unit of length is greater than the unit of area. ()

The simple operation of finding the sum of several addends is called multiplication. ()

6.296 billion tons ≈ 3 billion tons ()

Four, with a simple method to calculate (12 points)

( 1)36+59+4 1+54

(2)23×7+23×3

(3)78× 102

(4) 1462-369-63 1

V written calculation (12)

( 1)36987+5678

(2)50 162-3685

(3)628×502

(4)7968÷249

Six, from the type calculation (20 points)

( 1)60506- 19460÷35

(2)23072÷4 12×65

(3) 184×38+ 1 16×38- 1 1300

(4)(7969 1-46354)÷629

(5)325÷ 13×(266-250)

Seven, the application problem (25 points)

1.There are 48 students in Class A and Class B, each of whom made 16 paper flowers and sent them to kindergarten. How much did a * * * send?

The distance between a and b is 456 kilometers. How many hours does it take for the train to travel from A to B at an average speed of 76 kilometers per hour?

There are two grain warehouses. If the first warehouse is loaded with 2500 kilograms, the two warehouses have the same amount of food. It is known that the second warehouse has 50200 kilograms of grain. How many catties did the original two grain depots have?

The master produces 64 machine parts per hour, and the apprentice produces 48 parts per hour. How many hours does it take for the apprentice to complete the parts produced by the master in three hours?

5. A rectangular vegetable field is120m long and 60m wide. If one tomato is planted every12m2, how many tomatoes can be planted in this vegetable field? If each tomato charges 3 kilograms, how many kilograms does a tomato charge?

Reference answer

I. Oral calculation (omitted)

fill (up) a vacancy

1.39760000, 3976 2.5950000, 60 3.480, 48 4.5, 80 5.8060 6. Combine two numbers into a number 7 operation. Division 8. The exchange law of addition 9.0, 9.

Three. Judgment: (Mark "√" for the right and "×" for the wrong)

1.× 2.√ 3.× 4.× 5.× 6.√

Fourth, use simple methods to calculate.

1. 190 2.230 3.7956 4.462

V. Written calculation

1.42665 2.46477 3.3 15256 4.32

Six, off-type calculation

1.59950 2.3640 3. 100 4.53 5.400

VII. Application Problems

1. 1536 flowers 2.6 small