=75*( 100+2)

=75* 100+75*2

=7500+ 150

=7650

1.2×2.5

=( 1+0.2)*2.5

= 1*2.5+0.2*2.5

=2.5+0.5

=3

90. 1-9.9

=(90+0. 1)-( 10-0. 1)

=90+0. 1- 10+0. 1

=80+0.2

=80.2

Make up a few simple calculation problems for the fifth grade!

Grade five scores are simple and easy to calculate. 60 channels are 2/3-7/8+ 1/3.

=(2/3+ 1/3)-7/8

= 1-7/8

= 1/8

5/6-(3/7- 1/6)

=(5/6+ 1/6)-3/7

= 1-3/7

=4/7

1- 1/3-2/3

= 1-( 1/3+2/3)

= 1- 1

=0

1+3/5- 1/ 10

= 1+6/ 10- 1/ 10

= 1+ 1/2

= 1 and 1/2

3/8- 12/ 13+5/8

=3/8+5/8- 12/ 13

= 1- 12/ 13

= 1/ 13

1-( 1/2-3/4)

= 1+3/4-2/4

= 1+ 1/4

=5/4

1- 1/2- 1/4

= 1/2- 1/4

=2/4- 1/4

= 1/4

2/7-8/9+5/7

=(2/7+5/7)-8/9

= 1-8/9

= 1/9

2- 1/4-3/4

=2-( 1/4+3/4)

=2- 1

= 1

1/2-(3/8- 1/2)

= 1/2+ 1/2-3/4

= 1-3/8

=5/8

3/7-5/8+4/7

=3/7+4/7-5/8

= 1-5/8

=3/8

1/2- 1/3+ 1/2

= 1/2+ 1/2- 1/3

= 1- 1/3

=2/3

3/4-( 1/2- 1/4)

=3/4+ 1/4- 1/2

= 1- 1/2

= 1/2

3/5+4/5-2/5

=7/5-2/5

= 1

1/6-(3/4-5/6)

= 1/6+5/6-3/4

= 1-3/4

= 1/4

1/9-( 1/8-8/9)

= 1/9+8/9- 1/8

= 1- 1/8

=7/8

1/2-(3/5- 1/2)

= 1/2+ 1/2-3/5

= 1-3/5

=2/5

A simpler solution to the equation 1 and * * * In the fifth grade, a unit had to March 502 kilometers and began to walk 60 kilometers every day. After walking for 3 days, the rest of the journey is 20.5 kilometers per day. How many days will it take to finish it?

The rice in bag a weighs 68kg. After pouring 15kg from bag A into bag B, bag A is 5kg heavier than bag B ... How many kilograms of raw rice is there in bag B?

A steel mill produces 830 tons of steel every day for the first 3 days and 850 tons every day for the next 5 days. How many tons of steel is produced on average every day?

The motorcyclist traveled 60 kilometers at the speed of 20 kilometers per hour, and came back 30 kilometers per hour. What is the average speed of going back and forth?

5. Workers in the first workshop of a machine tool factory use 18 lathe to produce 720 machine parts in two hours. How many machine parts do 20 such lathes produce in three hours?

6. You can make120kg tofu with 30kg soybeans. According to this calculation, how many kilograms of soybeans do you need to make 600 kilograms of tofu?

An express train and an ordinary bus leave from two cities at the same time. The speed of express train is 90 kilometers per hour, and that of ordinary bus is 48 kilometers per hour. Two and a half hours later, two trains met on the road. How many kilometers is the railway between city A and city B?

8. The distance between the two places is 28 kilometers, and two cars, A and B, drive in the same direction from both places at the same time. A car travels 25 kilometers per hour, and B car travels 32 kilometers per hour. Car A is in the front and car B is in the back. How many hours will car B catch up with car A?

9. Cut a rectangular piece of paper with a length of 90 cm and a width of 20 cm into several square pieces of paper with the same size. It is required that the side length of the square is the largest, so as not to waste paper. How many squares can you cut?

10. In order to green the highway, the Bureau of Landscape Architecture planted a tree every 4 meters on both sides of a section of highway, and planted 74 trees at a time. Now it plans to plant a tree every 6 meters. So, how many trees will not be transplanted?

1 1, Party A has 14.8 yuan and Party B has 15.2 yuan. They want to buy a football together. The price of a football is twice their money. How much is a football? How much are they short of?

12. A machine plows 15 hectares in 3 hours. According to this calculation, how many hours does it take for five machines to plow 75 hectares?

13. There are 14 boxes of duck eggs in the store. Sold 250 kilograms, leaving 4 boxes of 20 kilograms. How many kilograms are there in each box of duck eggs?

14. bright primary school donated books to mountain students, with 240 books in grade four, twice as many as in grade five, and more books in grade six than in grade five 120. How many books did he donate per grade on average?

15. The grain store delivered 20 bags of rice and 20 bags of flour, each of which was 90kg of rice and 25kg of flour. How many kilograms more rice is brought in than flour? (Answer in two ways)

16. Two ropes * * * are 48.4m long. After cutting 6.4 meters from the first rope, the second rope is 6 meters more than the remaining two of the first rope. How long are the two ropes?

17. Students in Grade 4 and Grade 5 collect tree species, and the students in Grade 4 collect tree species 18.6 kg, and the students in Grade 4 collect 2.5 kg less than those in Grade 5. How many kilograms of tree species were collected in the second grade?

18. a workshop used to use 2450 kilowatts of electricity every month? At that time, after carrying out the saving activities, the electricity consumption of the original year can now be increased by two months. How many kilowatts does this workshop save electricity on average every month? What time?

19. The students took part in tree planting activities. 96 students in Grade 4 * * *, each of whom planted 3 trees. There are 87 people in the fifth grade, each of whom planted 4 trees. How many more trees were planted in the fifth grade than in the fourth grade?

20. Six students in the first group scored 86, 79, 98, 100, 89 and 94 respectively in the math test. What is their average score?

Simple operation problems in grade six, simple 1 125-997.

998+ 1246+9989

(8700+870+87)÷87

125×8.8

1.3+4.25+3.7+3.75

17. 15-(3.5-2.85) 3.4×99+3.4

4.8× 1.0 1

0.4×(2.5÷73)

( 1.6+ 1.6+ 1.6+ 1.6)×25

12.3-2.45-5.7-4.55

0. 125×0.25×64

64.2×87+0.642× 1300

78×36+7.8×74 1-7

25÷ 100

4.25-3 -(2 - 1 )

3.8÷3.9+3.9÷0. 1+0. 1÷3.9

Find a slightly simpler fifth-grade Olympic math problem ~~ 1. It takes 10 hour for a ship to sail from Port A to Port B, and 10 hour for it to return from Port B. Given that the distance between Port A and Port B is 300 kilometers, find the speed of the ship in still water.

(300 divided by 10+300 divided by 12) divided by 2.

=55 divided by 2

=27.5 km

2. The train runs at the speed of18m per second. The whole train passed a bridge with a length of 1 498m, which took1min 33 seconds. How long is this train?

1 min 33 seconds =93 seconds

18*93- 1498

= 1674- 1498

= 176 (m)

3. A train with a length of 126 m passed a bridge at a speed of 86.4 km/h and traveled for 1 min 16 seconds. How long is this bridge?

1000*86.4/3600

=86400/3600

=24 meters

1 min 16 sec =76 sec.

24*76- 126= 1698 (m)

4. A train with a length of133m passes through a tunnel with a length of 273m in 29 seconds and another tunnel with the same speed in 38 seconds. How long is the other tunnel?

( 133+273)/29= 14 (m)

14*38- 133=399 (m)

Urgently find a simpler (0.5+x)+x=9.8÷2 for solving the equation in grade five.

2(X+X+0.5)=9.8

25000+x=6x

3200=450+5X+X

X-0.8X=6

12x-8x=4.8

7.5*2X= 15

1.2x=8 1.6

x+5.6=9.4

x-0.7x=3.6

9 1÷x = 1.3

X+8.3= 10.7

15x =3

3x-8= 16

7(x-2)=2x+3

3x+9=27

18(x-2)=270

12x=300-4x

7x+5.3=7.4

3x÷5=4.8

30 \x+25 = 85

1.4×8-2x=6

6x- 12.8×3=0.06

4 10-3x= 170

3(x+0.5)=2 1

0.5x+8=43

6x-3x= 18

1.5x+ 18=3x

5×3-x÷2=8

0.273÷x=0.35

1.8x=0.972

x÷0.756=90

9x-40=5

x÷5+9=2 1

48-27+5x=3 1

10.5+x+2 1=56

x+2x+ 18=78

(200-x)÷5=30

(x- 140)÷70=4

0. 1(x+6)=3.3×0.4

4(x-5.6)= 1.6

7(6.5+x)=87.5

(27.5-3.5)÷x=4

x+ 19.8=25.8

5.6 times =33.6 times

9.8-x=3.8

75.6 \x = 12.6

5x+ 12.5=32.3

5(x+8)= 102

x+3x+ 10=70

3(x+3)=50-x+3

5x+ 15=60

3.5-5x=2

0.3×7+4x= 12.5

x÷ 1.5- 1.25=0.75

4x- 1.3×6=2.6

20-9x= 1.2×6.25

6x+ 12.8= 15.8

150×2+3x=690

2x-20=4

3x+6= 18

2(2.8+x)= 10.4

(x-3)÷2=7.5

13.2x+9x=33.3

3x=x+ 100

x+4.8=7.2

6x+ 18=48

3(x+2. 1)= 10.5

12x-9x=8.7

13(x+5)= 169

2x-97=34.2

3.4x-48=26.8

42x+25x= 134

1.5(x+ 1.6)=3.6

2(x-3)=5.8

65x+7=42

9x+4×2.5=9 1

4.2 x+2.5x= 134

10.5x+6.5x=5 1

89x-43x=9.2

5x-45= 100

1.2x-0.5x=6.3

23.4=2x=56

4x-x=48.6

4.5x-x=28

X-5.7=2. 15

15 5X-2X= 18

3X+0.7=5

3.5×2= 4.2+x

26× 1.5= 2x+ 10

0.5× 16― 16×0.2=4x

13 9.25-X=0.403

16.9÷X=0。 three

23x= 14x+ 14

x+ 14x=65

3-5 times =80

1.8 +6x=54

6.7 times -60.3=6.7

9 +4x =40

2x+8= 16

23x- 14x= 14

x+7x=8

9x-3x=6

6x-8=4

5x+x=9

x-8=6x

4/5x=20

2x-6= 12

7x+7= 14

6x-6=0

5x+6= 1 1

2x-8= 10

1/2x-8=4

x-5/6=7

3x+7=28

3x-7=26

9x-x= 16

24x+x=50

6/7x-8=4

3x-8=30

6x+6= 12

3x-3= 1

5x-3x=4

2x+ 16= 19

5x+8= 19

14-6x=8

15+6x=27

5-8x=4

7x+8= 15

9-2x= 1

4+5x=9

10-x=8

8x+9= 17

9+6x= 14

x+9x=4+7

2x+9= 17

8-4x=6

6x-7= 12

7x-9=8

x-56= 1

8-7x= 1

x-30= 12

6x-2 1=2 1

6x-3=6

9x= 18

4x- 18= 13

5x+9= 1 1

6-2x= 1 1

x+4+8=23

7x- 12=8

X-5.7=2. 15

15 5X-2X= 18

3X 0.7=5

3.5×2= 4.2 x

26× 1.5= 2x

0.5× 16― 16×0.2=4x

9.25-X=0.403

16.9÷X=0.3

X÷0.5=2.6

3-5 times =80

1.8-6x=54

6.7 times -60.3=6.7

9 +4x=40

0.2x-0.4+0.5=3.7

9.4x-0.4x= 16.2

12-4x=20

1/3x+5/6x= 1.4

12x+34x= 1

18x- 14x= 12

23 x-5× 14= 14

12+34x=56

22- 14x= 12

The fifth grade is one yuan, right?

Simple calculation in grade five: 2.9× 0.45+0.29× 4.2+0.029×13 = 2.9× 0.45+2.9× 0.1.4.2+2.9× 0.01.

=2.9×(0.45+0.42+0. 13)

=2.9× 1=2.9

3.84×9.6+0.96×6 1.6

=9.6×3.84+9.6×0. 1×6 1.6

=9.6×3.84+9.6×6. 16

=9.6×(3.84+6. 16)

=9.6× 10=96

7.2 1*5.3+47*0.72 1

=7.2 1*5.3+4.7*7.2 1

=7.2 1*(5.3+4.7)

=7.2 1* 10

=72. 1

Simple calculation of grade five is 75× 102.

=75*( 100+2)

=75* 100+75*2

=7500+ 150

=7650

1.2×2.5

=( 1+0.2)*2.5

= 1*2.5+0.2*2.5

=2.5+0.5

=3

90. 1-9.9

=(90+0. 1)-( 10-0. 1)

=90+0. 1- 10+0. 1

=80+0.2

=80.2

90. 1×9.9

=(90+0. 1)*( 10-0. 1)

=900-9+ 1-0.0 1

=908-0.0 1

=907.99

3.54×99+3.54

=3.54*99+3.54* 1

=3.54*(99+ 1)

=3.54* 100

=354

272÷ 125

=272*8/ 125*8

=2 176/ 1000

=2. 176