14-7.4=6.6, 1.92÷0.04=48, 0.32×500= 160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06= 1.44
0.75÷ 15=0.05, 0.4×0.8=0.32, 4×0.25= 1, 0.36+ 1.54=2
1.0 1×99=99.99, 420÷35= 12, 25× 12=300, 135÷0.5=270
3/4 + 1/4 = 1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 - 1/6 = 1/2, 7.5-(2.5+3.8)= 1.2, 7/8 + 3/8 =5/4
3/ 10 + 1/5 = 1/2, 4/5 - 7/ 10 = 1/ 10, 2 - 1/6 - 1/3 = 1.5
0.5 1÷ 17=0.03, 32.8+ 19=5 1.8, 5.2÷ 1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷ 12=0.5, 0.87-0.49=0.38
1.( 1+ 1/2)( 1+ 1/3)( 1+ 1/4)......( 1+ 1/ 100)
2.( 1- 1/2)( 1- 1/3)( 1- 1/4)......( 1- 1/ 100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26- 1.5)
6.286+ 198
7.3 14-202
8.526+30 1
9.223-99
10.6.25+3.85-2. 125+3.875
1 1.9-2456*2 1
12.0.5/ 1 1.5-4*2.75
13. 1/2×3/5
14.3.375+5.75+2.25+6.625
15. 100 1-9036÷ 18
16.3.8×5.25+ 14.5
17.2. 1*4.3+5.7*2. 1
18.30× 1/3
19. 102*45-328
20.2/3× 12
2 1.2.8*3. 1+ 17.6/8
22.3/5×5/6
23.(50- 12.5)/2.5
24.2/5× 1/3
25.6 1 10*47+639
26. 1/2- 1/6
27.3.5*2.7-52.2/ 18
28. 1/7× 1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
3 1.6.54+2.4+3.46+0.6
32.5/6- 1/2
33.95.6* 1.8+95.6*8.2
34. 1/2× 1/5
35.600-420/ 12
36.344/3.6-5.4*0.25
37. 16/2+30/2+90/6
38.300 1- 1998.
39.5000- 105*34
40.0. 15/0.25+0.75* 1.2
4 1.( 1/2+ 1/3+ 1/4)*0.24
42.(25+4)*4
43.300-4263/2 1
44.0.8 1/0.25+5.96
45.403÷ 13×27
46. 1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.( 1.2+ 1.8)×4.5 1025-768÷32
49.0.25×80-0.45÷0.9
50. 1025-768÷32
5 1.0.25*2.69*4
52.2348+275* 16
53.2/9* 15/8- 1/ 12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45* 12
56.0. 15+ 1.2/0.24-0.45
57.3.75-(2.35+0.25/ 1.25)
58.76* 1/4+23*25/ 100+0.25
59. 10-2.87-7. 13
60.0.96+9.6*9.9
6 1.7.5-5.7* 1/3
62. 12.37-3.25-6.75
63. 16*6.8+2.2* 16+ 16
64.40 1* 19+284
65.58.7- 16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.3 1- 1. 125-7.875
68.640+ 128*45
69.8.2* 1.6-0.336/4.2
70.400*(0.62+0.08)
2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2
4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35
4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14
30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18
5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4
10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5
8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8
9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18
123+25= 148 123-35=88 56×7=392 135÷5=27
248+89=337 ... 146-23= 123 ... 155×5=775 ...456- 12=38 ...
456+45=50 1 ...546-457=89 ...45× 10=45 1 ...564- 12=47 ...
879+54=933 ...896-546=350 ...56× 12=672....45-5=9 ...
457+456=9 13 ...
exclusive of
30.8÷[ 14-(9.85+ 1.07)]
[60-(9.5+28.9)]÷0. 18
2.88 1÷0.43-0.24×3.5
20×[(2.44- 1.8)÷0.4+0. 15]
28-(3.4+ 1.25×2.4)
2.55×7. 1+2.45×7. 1
777×9+ 1 1 1 1×3
0.8×〔 15.5-(3.2 1+5.79)〕
(3 1.8+3.2×4)÷5
3 1.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷ 1.8×0.9
36.72÷4.25×9.9
5 180-705×6
24÷2.4-2.5×0.8
(4 12 1+2389)÷7
67 1× 15-974
469× 12+ 1492
405×(32 13-3 189)
3.4 16÷(0.0 16×35)
0.8×[( 10-6.76)÷ 1.2]
19.4×6. 1×2.3
5.67×0.2-0.62
18. 1×0.92+3.93
0.0430.24+0.875
0.4×0.7×0.25
0.75× 102 100-56.23
0.78+5.436+ 1
4.07×0.86+9. 12.5
30.8÷[ 14-(9.85+ 1.07)]
[60-(9.5+28.9)]÷0. 18
2.88 1÷0.43-0.24×3.5
20×[(2.44- 1.8)÷0.4+0. 15]
28-(3.4+ 1.25×2.4)
2.55×7. 1+2.45×7. 1
777×9+ 1 1 1 1×3
0.8×〔 15.5-(3.2 1+5.79)〕
(3 1.8+3.2×4)÷5
3 1.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷ 1.8×0.9
36.72÷4.25×9.9
5 180-705×6
24÷2.4-2.5×0.8
(4 12 1+2389)÷7
67 1× 15-974
469× 12+ 1492
405×(32 13-3 189)
3.4 16÷(0.0 16×35)
0.8×[( 10-6.76)÷ 1.2]
19.4×6. 1×2.3 5.67×0.2-0.62
18. 1×0.92+3.93 0.0430.24+0.875
0.4×0.7×0.25 0.75× 102 100-56.23
0.78+5.436+ 1 4.07×0.86+9. 12.5
Simple calculation
Is multiplication/division
0.3*2.5*0.4
50*0. 13*0.2
0.8*630*0. 125
0.78* 10 1
1.5* 102
9.8*25
1.2*2.5+0.8*2.5
1.25*0.7*0.8
0.038*5*2. 1
3.8+4.5+6.2
93/0.3 1/3
3.25-0.84-0. 16
88*0.25*4
2.8*3.6+ 1.4*2.8
63* 10. 1
(3.2+0. 128)/0.8
9.83* 1.5+6. 17* 1.5
10. 1*87
3 12*4+ 188*4
0. 135*500*0.2
6.3+0.84+3.7+8. 16
18.75-0.43-4.57
0.25*0.03*4
13.7*0.25*8
2.65* 1.7+ 1.35* 1.7
32.8+5.6+7.2
(2.5+0.25)*0.4
8*(2.5*0.25)
8.4*0.2+ 1.6*0.2
1.25*0.8*0.5
( 1.5+0.25)*0.4
1.2*0.4+ 1.3*0.4
equation
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
x+ 13=33
3-5 times =80
1.8 +6x=54
6.7 times -60.3=6.7
9 +4x =40
2x+8= 16
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
23x- 14x= 14
x+ 14x=65
23x= 14x+ 14
30x 12x- 14x= 1
x-0.7x=3.6
application problem
First, the application of decimal step addition and subtraction
1, 6.25 yuan for a math book and 5.86 yuan for a Chinese book. Two books and one * * *, how much is it?
2. A watermelon weighs 4.86 kg and a cantaloupe weighs 3.5 kg. How many kilograms is a watermelon heavier than a cantaloupe?
One-step multiplication and division of two decimal places 1 a kind of wool is 48.36 yuan per kilogram. How much is 3 kilos? Buy 0.6 kg?
2. A professional sericulture group raises 2 1 spring silkworm and one * * * produces1.24kg cocoon. How many kilograms of cocoons are produced per piece on average?
Three, three two-step calculation application problems with known conditions 1, Xiaohong read a story book for five days, reading 12 pages every day, but didn't read 38 pages. How many pages are there in this book? (Draw a line segment)
3 bags of flour and 3 bags of rice in the canteen. Flour is 25 kg per bag and rice is 50 kg per bag. How many kilograms of flour and rice are shipped?
3. The militia targeted the target, using 250 bullets for the first time, 320 bullets for the second time, and the third time was less than the sum of the previous two times 180 bullets. How many bullets were used for the third time?
Four, two-step calculation application problems under two known conditions
1. The school bought 45 boxes of colored chalk, and white chalk bought more than colored chalk 15 boxes. How many boxes of chalk do I buy?
2. An empty basket weighs 2kg, and there are 32kg peanuts in it. How many times the weight of the basket containing peanuts is that of the empty basket?
The Application of verb (Verb's abbreviation) Multiplication
1. The grain store sent two truckloads of flour, each with 80 bags of 25 kilograms. How many kilograms of flour did this grain shop send? (Answer in two ways)
2. Junior three students go to the vegetable garden to collect cabbages, which are divided into four groups, each group 1 1 person, with an average of 45kg per person. A * * * How many kilograms of cabbage?
1. The chemical fertilizer plant plans to produce 7,200 tons of chemical fertilizer, which has been produced for four months, with an average of 1200 tons of chemical fertilizer per month, leaving 800 tons per month. How many months will it take to complete the production?
2. The plastic factory planned to produce 1300 plastic modules, and produced 780 plastic modules in 6 days. According to this calculation, how many days will it take to produce the rest?
Li Shifu produced 252 parts in four hours in the morning, and worked at this speed for three hours in the afternoon. How many parts does Li Shifu produce on this day?
The cement plant plans to produce 3600 tons of cement, which will be completed in 20 days. In fact, it produces 20 tons more than planned every day. How many days does it actually take to complete the task?
5. A pile of 3.6 tons of coal is planned to burn 10 day. After improving the stove, it saves 0.06 tons per day compared with the original plan. How many days can this pile of coal burn now?
6. The distance between A and B is 420km, and a bus is planned to travel from A to B for 7 hours. In fact, its speed is more than planned 10 km. How many hours will it actually arrive?
7. Xiao Qiang goes back to school from home. If he walks 50 meters every minute, 12 minutes to go back to school. If he walks 10 meter per minute, he can go back to school a few minutes earlier.
8. Build a 6.4-kilometer expressway. In the first three months,1.2km was built on average every month, and the rest were repaired every month. How many months will it take?
9. Xiaoming spent 10.2 yuan on stationery, bought six pencils at 0.45 yuan each, and bought ballpoint pens for the rest. How many can he buy for each 2.5 yuan?
10. The garment factory originally planned to make 120 suits, each with 4.8m cloth. After improving the cutting method, each set saves 0.3 meters of cloth. How many sets of clothes can be made from the original cloth now?
1 1. A story book, originally 576 words per page, 25 pages. The second edition, with smaller words, only needs 18 pages. How many words are arranged on each page now than before?
12. A passenger train and a freight train leave from Party A and Party B at the same time. The speed of passenger trains is 80 kilometers per hour, and that of freight trains is 60 kilometers per hour. Five hours later, two trains met. How many kilometers is the railway between A and B?
13. Two engineering teams open1500m tunnel at the same time. Construction team A starts from one end and digs 14m every day. Construction team B starts from the other end and digs 16m every day. How many days can the tunnel be dug?
14. Party A and Party B type a 7000-word manuscript at the same time. Party A types 600 words per hour, and Party B types 200 words more than Party A. How many hours does it take to complete the task?
15. After school, Xiao Ming and Xiao Qiang walk in opposite directions at the school gate. Xiaoming walks 70 meters per minute, and Xiao Qiang walks 68 meters per minute. How many meters are they apart after 5 minutes?
16, the distance between a and b is 630 kilometers. Two hours after the bus departs from A, the truck departs from B. It is known that the speed of the bus is 65 kilometers per hour and the speed of the truck is 60 kilometers per hour. A few hours after the van left, it met the bus.