50×2= 400×6= 22×3= 57÷9=

460-80= 23×4= 57×0= 4 1×3=

8000×5= 5050÷5= 240÷8= 230-40=

240×2= 0÷90= 130×4= 9300÷3=

1008×5= 28÷4= 0+8= 3×0=

900÷3= 25×4= 56÷2= 24×5=

15×4= 50×4= 3 10×7= 980÷7=

40×2= 105×4= 30×2= 120×3=

9000÷3= 0÷2= 840÷4= 2000×4=

2 1×3= 50×4= 10000÷5= 80÷4=

60÷9= 1000×7= 300×5= 240÷6=

500×9= 8000÷2= 860÷2= 60×7=

7×4+2= 2 1×3+4= 40÷2+ 1= 1+72÷8=

9×4+4= 2×8÷4= 12×5÷2= 36÷9+2=

30÷5+2= 8 1÷9+7= 6×5+7= 7×4+9=

80×6×0= 770÷7+ 1= 80+20÷2= 10-0÷5=

35-35÷7= 7+3×0= 6×8÷3= 40+ 10÷2=

Second, write calculations. (24× 1 = 24+6× 1.5 = 33 points)

1800×4= 1040÷5= 1206÷8= 1356×7=

2080×3= 246×3= 56×5= 9020÷3=

174×6= 3275÷5= 1 186×7= 384×8=

352÷4= 87 1÷3= 9 180÷3= 520×4=

7224÷6= 535×5= 7380÷9= 1236÷6=

624×9= 1280+489= 2849÷7= 2550- 1900=

640×4= 5320÷7= 8403÷4=

Check calculation: Check calculation:

5320÷6= 5200÷9= 60 16÷4=

Check calculation: Check calculation:

Third, calculation. (15× 0.5 = 8 points) Look out!

1 m -3 decimeter = 8 100 kg ÷ 9 = 9 10 g -2 10 g =

9 tons -4000 kg = 5044 g -3000 g = 8000 kg -5 tons =

1 km-10/0m = 2cm+48cm = 1 decimeter-9mm =

36 tons +60 tons = 100 km -85 km = 1 ton -400 kg =

9 kg 300 g -7 kg 200 g = 7 tons 40 kg-1 ton 20 kg =

63mm+17mm = () mm = () cm

Fourth, off-type calculation. (65438+ 0.5 for each question, ***20 questions, 30 points)

43×2+25×5 602×4-245×3

64÷8+486÷6 942÷3- 100÷5

64÷4+64×4 5×7-48÷6

42÷7+36÷6 37×4+ 19×8

102×4-492÷4 156÷3+ 100÷5

2 15÷5+438÷6 975÷5+ 13×7

Hurry up!

7200÷9-2 100÷6 2 10×4-549÷9

1544÷8+ 102×5 3 192÷4+2 10×2

9525÷5- 1992÷4 1568÷7+3600÷6

506×(400-396) 7200÷9-500+ 100

5. Fill in the blanks. (0.25× 4 = 1+0.5× 4 = 3 points) Think about it!

1 .2 10 is obtained by multiplying four one-digit numbers.

2 10= × × ×

2. Fill in the numbers in the box to make the formula hold.

( 1)42÷7+□ =40 (2)(70+26)÷□=32

(3)□×5+70=85 (4)□÷( 16-9)=90

Special training of calculation problems in grade three

Calculation problem 1

1.3724 2.8673 3. 1243

696 + 928 × 2

4.3002 5.7 6.4800

× 2 × 402 × 2

7.428 8.93

× 6 × 4

9.48÷8×7 10.3600? 458+ 1204

1 1.493+25×7 12.305×(30 1? 297)

Calculation problem 2

1.(4586+3654)÷4 2.2045÷5? 168

3.3834÷6×4 4.3 120÷5÷3

5.4020÷4=

calculate

6.5853÷9=

Check calculation:

Calculation problem 4

1.280÷4+360÷9 2.90×4+70×3 3. 180×2-50×6

4.588÷7-29×2 5.96÷6+45×9 6.450÷3-420÷7

Computation and human beings are various disciplines in modern human beings, involving a wide range and detailed classification. Nowadays, every subject needs a lot of calculation.

Calculation is a kind of thinking process that transforms a single or complex input value into a single or complex result.

The definition of calculation can be used in many ways, from a fairly precise definition, such as "arithmetic" with various algorithms, to a more abstract definition, such as "calculation of strategy" or "calculation of the success probability of two people in a game". ? 7 times 8(7x8) is a simple arithmetic. Calculations in mathematics include addition, subtraction, multiplication, division, multiplication, root and so on. Addition, subtraction, multiplication and division are called four operations. ? Using Black-Scholes pricing model (Black-Scholes? Model) to calculate the fair price in financial evaluation (fair? Price is a complicated arithmetic. ? ? The election results (opinion polls) evaluated from the calculation of voting intention also contain some arithmetic, but the results provided are "the range of various possibilities" rather than a single correct answer. ? The way to determine how to establish a relationship between people is also the result of a calculation, but this calculation is difficult to be accurate, unpredictable or even clearly defined. This definition of calculation with infinite possibilities is completely different from the mathematical arithmetic mentioned above. ? ? Calculation in English is "calculation", which comes from Latin "Calculus" and refers to the small stone used for calculation on the abacus.

Calculations made by players in specific contact battles. Sometimes it also refers to a chess player's computing ability. After calculation, it is characterized by comprehensive consideration. It is often different from the hand (feeling) that makes judgments instantly. The deeper and more accurate the calculation, the stronger the chess power.

function

Calculation is mainly used in the scientific field, which can be called scientific calculation. ? Calculation is not only the basic skill of mathematics, but also the tool of the whole natural science. When studying at school, you must master the basic survival skills of computing; In scientific research, we must use calculation to complete the key problems of research; The breakthrough development of national economy, computer and electronic industry must be based on mathematical calculation.

Therefore, computing is the main method in basic education, and it is widely used in various disciplines, high-performance computing and other advanced technologies. Astronomical research institutions need computers to analyze space pulses and satellite position movements; Biologists need computers to simulate protein's folding (protein? Folding) process, discover the mystery of the genome; Pharmacists want to develop drugs to treat cancer or various bacteria and viruses, and medical scientists are developing new ways to prevent aging;

Mathematicians hope to calculate the largest prime number and more accurate value of π; Economists should use computer analysis to calculate the development direction of an enterprise/city/country under the consideration of tens of thousands of factors in order to carry out macro-control; Industry needs to accurately calculate the best scheme of material, energy, processing and time allocation in the production process. It can be seen that the future science of mankind is inseparable from calculation all the time. And distributed computing (distributed? Computing), with its unique advantages-cheap and efficient, has attracted more and more attention from the society.

Basic information

Computing and human beings? Due to the diversity of modern human subjects, they cover a wide range and are classified in detail. Nowadays, every subject needs a lot of calculation.

Astronomical research institutions need computers to analyze space pulses and satellite position movements; Biologists need computers to simulate protein's folding (protein? Folding) process, discover the mystery of the genome; Pharmacists want to develop drugs to treat cancer or various bacteria and viruses, and medical scientists are developing new ways to prevent aging;

Mathematicians hope to calculate the largest prime number and more accurate value of π; Economists should use computer analysis to calculate the development direction of an enterprise/city/country under the consideration of tens of thousands of factors in order to carry out macro-control; Industry needs to accurately calculate the best scheme of material, energy, processing and time allocation in the production process. It can be seen that the future science of mankind is inseparable from calculation all the time. And distributed computing (distributed? Computing), with its unique advantages-cheap and efficient, has attracted more and more attention from the society.