2. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeter, 1.5 decimeter and 1.2 decimeter respectively. How many square meters does it take to make such an iron box?
3. How many square meters of glass does it take to make a 3-minute uncovered cube glass fish tank?
Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, it is known that 5 yuan painting costs per square meter. How much does it cost to paint a classroom?
A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?
6. The length, width and height of woodcut are 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters of wood carving does it take to make five such drawers?
7. There is a fish pond with a length of 18m, a width of 12m and a depth of 3.5m Cement should be coated around the fish pond to prevent water seepage. If water is used per square meter,
5 kilograms of mud, how many kilograms of cement does a * * * need?
8. The processing factory will process a batch of TV sets. (No bottom) Each TV is 60 cm long, 50 cm wide and 55 cm high. How many square meters of cloth does it take to make 1000 sets?
9.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high. How many square meters of iron do you need?
10, rectangular goldfish bowl, 8 cm long, 5 cm wide and 6 cm high. I accidentally broke the front glass, and the matching area of the glass during maintenance was ().
1.m: Students in our class 1/4 joined the choir. Language: 2/8 students in our class participated in the model airplane group. Female: Eight students in our class took part in the sports group.
There are 40 students in this class. Which group has fewer students? What are the numbers of the other two groups?
A cuboid reservoir is 8m long, 5m wide and 3m deep. What is the area of this reservoir? How many cubic meters of water can it hold at most?
Xiaoming's father made a cube fish tank with a length of 6dm out of glass. How many square meters of glass does it take to make this fish tank? Xiaoming injected 144L water into the fish tank. What is the height of the water?
5. In the last four quarters, Machine Tool Plant has completed the annual tasks of 1/6, 1/5, 4/ 15 and 7/ 10 respectively. How many points did you exceed last year's annual plan?
6. A batch of steel was sent from the construction site, including 2 tons of round steel, 2/5 tons of square steel and other steel 1/7 tons. How many tons of steel are there?
7. look for it
A two-digit number, the number of ten digits is exchanged with the number of one digit, and the two digits obtained are still prime numbers. Write two such two-digit numbers.
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
36.25÷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
19.4×6. 1×2.3
5.67×0.2-0.62
18. 1×0.92+3.93
0.4×0.7×0.25
0.78+5.436+ 1
4.8× 5÷4+ 1÷4
9.9x5÷6+5÷6
10.3 \4x 8 \9- 1 \3
14.3 1x5÷6-5÷6
16.5÷9x 18- 14x2÷7
20.3x2÷9+ 1÷3
35.95÷(64-45)
36. 178- 145÷5×6+42
7.2÷0.8- 1.2×5
6.5×(4.8- 1.2×4)
28-(3.4+ 1.25×2.4)
2.55×7. 1+2.45×7. 1
777×9+ 1 1 1 1×3
(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)
19.4×6. 1×2.3
5.67×0.2-0.62
18. 1×0.92+3.93
0.043×24+0.875
0.4×0.7×0.25
0.78+5.436+ 1
4.07×0.86+9. 12
240×78÷( 154- 1 15)
1437×27+27×563
〔75-( 12+ 18)〕÷ 15
2 160÷〔(83-79)× 18〕
280+840÷24×5
325÷ 13×(266-250)
85×(95- 1440÷24)
58870÷( 105+20×2)
1437×27+27×563
8 1432÷( 13×52+78)
[37.85-(7.85+6.4)] ×30
156×[( 17.7-7.2)÷3]
(947-599)+76×64
36×(9 13-276÷23)
[ 192-(54+38)]×67
8 1432÷( 13×52+78)
(947-599)+76×64
60-(9.5+28.9)÷0. 18
2.88 1÷0.43-0.24×3.5
0.8×〔 15.5-(3.2 1+5.79)〕
(3 1.8 3.2×4)÷5
194-64.8÷ 1.8×0.9
36.72÷4.25×9.9
3.4 16÷(0.0 16×35)
0.8×[( 10-6.76)÷ 1.2]
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(58+37)÷(64-9×5)
8 12-700÷(9+3 1× 1 1)
(3.2× 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26)
120-36×4÷ 18+35
9.72× 1.6- 18.305÷7
3.2×( 1.5+2.5)÷ 1.6
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
120-36×4÷ 18+35
. 15- 10.75×0.4-5.7
347+45×2-4 160÷52
(58+37)÷(64-9×5)
[(7. 1-5.6)×0.9- 1. 15] ÷2.5
(3.2× 1.5+2.5)÷ 1.6
5.4÷[2.6×(3.7-2.9)+0.62]
12×6÷( 12-7.2)-6
3.2×6+( 1.5+2.5)÷ 1.6
(3.2× 1.5+2.5)÷ 1.6
120- 144÷ 18+35
347+45×2-4 160÷52
(58+37)÷(64-9×5)
95÷(64-45)
8 12-700÷(9+3 1× 1 1)
120-36×4÷ 18+35
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
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)
0.8×[( 10-6.76)÷ 1.2]
19.4×6. 1×24
5.67×0.2-0.62
18. 1×0.92+3.93
24+0.875×99
0.4×0.7×0.25
0.75× 102
100-56.23
3 1.50+ 160÷40
(58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42
420+580-64×2 1÷28
37.8 12-700÷(9+3 1× 1 1)
( 136+64)×(65-345÷23)
38.85+ 14×( 14+208÷26)
120-36×4÷ 18+35
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
3.2×( 1.5+2.5)÷ 1.6
3 1.50+ 160÷40
(58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42
420+580-64×2 1÷28
8 12-700÷(9+3 1× 1 1)
( 136+64)×(65-345÷23)
(284+ 16)×(5 12-8208÷ 18)
120-36×4÷ 18+35
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
(23.2×( 1.5+2.5)÷ 1.6
45.6- 1.6÷4=
5.38+7.85-5.37=
46.7÷0.8- 1.2×5=
6- 1. 19×3-0.43=
47.6.5×(4.8- 1.2×4)=
0.68× 1.9+0.32× 1.9
297×999
1983×2 1+2 1×30 17
(0. 123+ 123) × 1009
34×24+348 1
0.8×0. 196+0.094
105+895×57
32.47×23+27
39.0 1× 18.3-90 1
76.5+2-2× 184
49+23× 14
3 1×99
52×99+52
25×32× 125
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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
36.25÷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
19.4×6. 1×2.3
5.67×0.2-0.62
18. 1×0.92+3.93
0.4×0.7×0.25
0.78+5.436+ 1
4.8× 5÷4+ 1÷4
9.9x5÷6+5÷6
10.3 \4x 8 \9- 1 \3
14.3 1x5÷6-5÷6
16.5÷9x 18- 14x2÷7
20.3x2÷9+ 1÷3
35.95÷(64-45)
36. 178- 145÷5×6+42
7.2÷0.8- 1.2×5
6.5×(4.8- 1.2×4)
28-(3.4+ 1.25×2.4)
2.55×7. 1+2.45×7. 1
777×9+ 1 1 1 1×3
(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)
19.4×6. 1×2.3
5.67×0.2-0.62
18. 1×0.92+3.93
0.043×24+0.875
0.4×0.7×0.25
0.78+5.436+ 1
4.07×0.86+9. 12
240×78÷( 154- 1 15)
1437×27+27×563
〔75-( 12+ 18)〕÷ 15
2 160÷〔(83-79)× 18〕
280+840÷24×5
325÷ 13×(266-250)
85×(95- 1440÷24)
58870÷( 105+20×2)
1437×27+27×563
8 1432÷( 13×52+78)
[37.85-(7.85+6.4)] ×30
156×[( 17.7-7.2)÷3]
(947-599)+76×64
36×(9 13-276÷23)
[ 192-(54+38)]×67
8 1432÷( 13×52+78)
(947-599)+76×64
60-(9.5+28.9)÷0. 18
2.88 1÷0.43-0.24×3.5
0.8×〔 15.5-(3.2 1+5.79)〕
(3 1.8 3.2×4)÷5
194-64.8÷ 1.8×0.9
36.72÷4.25×9.9
3.4 16÷(0.0 16×35)
0.8×[( 10-6.76)÷ 1.2]
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(58+37)÷(64-9×5)
8 12-700÷(9+3 1× 1 1)
(3.2× 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26)
120-36×4÷ 18+35
9.72× 1.6- 18.305÷7
3.2×( 1.5+2.5)÷ 1.6
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
120-36×4÷ 18+35
. 15- 10.75×0.4-5.7
347+45×2-4 160÷52
(58+37)÷(64-9×5)
[(7. 1-5.6)×0.9- 1. 15] ÷2.5
(3.2× 1.5+2.5)÷ 1.6
5.4÷[2.6×(3.7-2.9)+0.62]
12×6÷( 12-7.2)-6
3.2×6+( 1.5+2.5)÷ 1.6
(3.2× 1.5+2.5)÷ 1.6
120- 144÷ 18+35
347+45×2-4 160÷52
(58+37)÷(64-9×5)
95÷(64-45)
8 12-700÷(9+3 1× 1 1)
120-36×4÷ 18+35
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
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)
0.8×[( 10-6.76)÷ 1.2]
19.4×6. 1×24
5.67×0.2-0.62
18. 1×0.92+3.93
24+0.875×99
0.4×0.7×0.25
0.75× 102
100-56.23
3 1.50+ 160÷40
(58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42
420+580-64×2 1÷28
37.8 12-700÷(9+3 1× 1 1)
( 136+64)×(65-345÷23)
38.85+ 14×( 14+208÷26)
120-36×4÷ 18+35
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
3.2×( 1.5+2.5)÷ 1.6
3 1.50+ 160÷40
(58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42
420+580-64×2 1÷28
8 12-700÷(9+3 1× 1 1)
( 136+64)×(65-345÷23)
(284+ 16)×(5 12-8208÷ 18)
120-36×4÷ 18+35
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
(23.2×( 1.5+2.5)÷ 1.6
45.6- 1.6÷4=
5.38+7.85-5.37=
46.7÷0.8- 1.2×5=
6- 1. 19×3-0.43=
47.6.5×(4.8- 1.2×4)=
0.68× 1.9+0.32× 1.9
297×999
1983×2 1+2 1×30 17
(0. 123+ 123) × 1009
34×24+348 1
0.8×0. 196+0.094
105+895×57
32.47×23+27
39.0 1× 18.3-90 1
76.5+2-2× 184
49+23× 14
3 1×99
52×99+52
25×32× 125