Simple calculation: [5 / 6 - (5 / 12-2 / 5)] 7 / 18

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• 1. Simple calculation of 26.64 + 6.37-18.64 + 13.63
• 2. Simple operation of 5 / 6 * 1 / 13 + 5 / 9 * 2 / 13 + 5 / 18 * 6 / 13
• 3. Simple calculation: 18.86-6.27 + 1.14-4.73
• 4. Simple operation of 1-5 / 7 * 21 / 25
• 5. Simple calculation of 36 × 25% + 3.6 × 7.5
• 6. Ask: mathematical calculation problem, one and one-third times three fifths, how to calculate?
• 7. How to calculate 12 * 9 / 19? Why is it calculated like this?
• 8. A mathematical calculation problem: simple calculation Brain: 132 × 88 + 157 × 12 =
• 9. Calculate 3 √ 0.2 + 4 √ 125 + √ 1 / √ 27 - √ 75 =?
• 10. 27-18 + (- 7) - 32 1 / 3 + (- 1 / 5) + 1 + 20 / 3 + (- 1 / 4) - (- 2.75) + 1 / 2 The mixed operation of (- 2 / 3) + (- 1 / 6) - (- 1 / 4) - 1 / 2 to calculate rational numbers
• 11. Observe such a column of data, (2), (4,6), (8,10,12), (14,16,18,20) According to this rule, what group is 2008 in? If you want to say why, you can't count them one by one
• 12. 2+4+6+8+10+12+14+16+18+20+22+…… +2002
• 13. 2*4*6*8*10*12*14*16*18*20=? Method
• 14. How to calculate 125 × 36 + 25 × 18 with simple method
• 15. How to use simple method to calculate mathematics 2 + 4 + 6 + ·· + 18 + 20
• 16. 4 and 7 / 16 - (1.26 + 7 / 16) - 0.74
• 17. 3.25 × 0.8-0.8 4 / 7 / 5 2 / 7 × 29 / 7 + 2 / 3 26 25000 × 4.14% × 5
• 18. 76 - [(0.74 + 0.26) divided by 0.8=
• 19. Use 1, 2, 3, 4, 5, 6, 7, 8 and 9 to fill in the nine palace grid, so that the number of horizontal, vertical and diagonal lines is 16 If not, it's OK
• 20. Answer: 28 1 3 7 4 1 3 8 7 6 2 5 8 4 9 8 5 9 6 7 4 9 3 5 81 Jiugong grid: ***2**8** *1*3***7* **41**3** 8**47**6* *2*5***8* *4*98***5 **5**96** *7***4*9* **3**5***