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30 comprehensive formulaic problems in primary school It's not an applied problem, it's not a score For example: 24 × (54-12) △ 12 I'm talking about forms like this You pig ah.. what press calculator all come.. your that is not rubbish What I want is 30 formulas That is the title You are a real pig
Find it yourself!
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -（ 3/2 + 4/5 ）
8. 7/8 + （ 1/8 + 1/9 ）
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ＋1.8×0.9=7.2 (9－5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×（ 1/2 + 2/3 ）
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - （ 2/7 – 10/21 ）
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50＋160÷40 （58+370）÷（64-45）
32.120-144÷18+35
33.347+45×2-4160÷52
34（58+37）÷（64-9×5）
35.95÷（64-45）
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷（9+31×11） （136+64）×（65-345÷23）
38.85+14×（14+208÷26）
39.（284+16）×（512-8208÷18）
40.120-36×4÷18+35
41.（58+37）÷（64-9×5）
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.（3.2×1.5+2.5）÷1.6 （2）3.2×（1.5+2.5）÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷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
48.10.15-10.75×0.4-5.7
49.5.8×（3.87-0.13）+4.2×3.74
50.32.52-（6+9.728÷3.2）×2.5
The reciprocal of a number is 15% of 9. What's the number?
Number a is 35, which is 7% of number B. what is the sum of number a and number B?
1. 9 * 15% = 1.35 = 27 / 20 the reciprocal of 27 / 20 is 20 / 27
2. 35/7%=500 35+500=535
Physics calculation, please write the calculation process
A radar transmits electromagnetic wave to a bomber, and it receives the reflected signal after 2x10 minus 4 seconds. How far is the bomber from the radar? If the frequency of electromagnetic wave is 300MHz, how long is its wavelength?
The speed of the electromagnetic wave is the speed of light, C = 3x10 to the eighth power, and the time of the reflected signal is a round-trip time of the electromagnetic wave, so the unilateral time is generally T = 10 to the negative fourth power, so the distance S = CT = 3x10 to the fourth power
1. Crow drinking water: there is a 3 * 10-4 cubic meter bottle containing 0.2kg water. A crow sees a small stone with a mass of 0.01kg each time and puts it into the bottle. When the crow throws 25 identical stones, the water surface rises to the top of the bottle
1. Total volume of stones in the bottle
2. Density of stone
Please help me by 22 o'clock
I don't remember the density of the water
First, divide the weight of water by the density of water to calculate the volume of water
The total volume of stones in the bottle = 3 * 10-4 cubic meters minus the volume of water calculated above
The density of stones = the weight of 25 stones divided by the total volume of stones in the bottle
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