What's 2 out of 9 minus 1 out of 10

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1. If 4 plus 2 equals 28, 6 plus 3 equals 218, 8 plus 4 equals 232, 9 plus 3 equals 327, which 10 If four plus two equals 28, six plus three equals 218, eight plus four equals 232, nine plus three equals 327, which one is ten plus two?
2. If 4 + 2 = 28; 6 + 3 = 218; 8 + 4 = 232; 9 + 3 = 327, then 10 + 2 =?
3. If 4 + 2 = 28.6 + 3 = 218.8 + 4 = 232.9 + 3 = 327. Then 10 + 2 =? If 4 + 2 = 28.6 + 3 = 218.8 + 4 = 232.9 + 3 = 327. Then 10 + 2 =?
4. 1,2,3,4,5,6,7,8,9, or add or multiply or subtract, the result is equal to 30
5. 2 of 15 + 2 of 35 + 2 of 63 + 2 of 99 + 2 of 143 + 2 of 195 =?
6. 23+215+235+263+299+111．
7. What is 9 times 99 times 10
8. What is the simple algorithm of 186 plus (35 times 12 minus 280) We need to use the formula to calculate! Bracketed
9. Simple calculation 35 times 8 times 15
10. Simple calculation: 1) 2000 by 2001, 2) 3 by 8, 0.25 plus 1 by 4, 5 by 8, minus 1 by 4 ③ 17 out of 20 times 2 out of 3 plus 17 out of 20 times 1 out of 3 minus 1 out of 2
11. What is 12 minus 2 and 7 / 9
12. What is nine out of two?
13. What's four ninths minus two?
14. 2 3 4 5 6 7 1 add and subtract multipliers in order and use them casually. The result should be equal to 51
15. 3 7 - 3 - 7 will add and subtract the four multipliers to make the result equal to 24
16. -5 + 8 - 4 + 2 plus or minus multiplier calculation, so that the result is equal to 4 or 24 Urgent! Let the result equal to 24 or - 24, the wrong number, no four
17. 3,4,6,10 plus and minus multipliers are 24
18. Six minus one sixth is equal to? There is also the equation: (1) 5 / 6 + 1 / 3-x = 1 / 5 (2) 6.5 times 3 + 3x = 33 (3) 3x-1 / 4 = 3 / 4 Question by question in order, the equation to write the process
19. On the English saying that ten minus four equals six There are three options A.TEN MINUS SIX IS FOUR B.TEN MINUS SIX EQUALS TO FOUR C.TEN SUBTRACT SIX IS FOUR The correct answer is a. why are B and C wrong?
20. What's 10 minus 8 out of 15