48 times () = 56 times () How much is it in brackets?
7 and 6
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- 1. 56 times 20 =? If a * b = 56, then [a * 10 * b * 10 =? ];[a/2]*b/2=? *It's multiplication and division/
- 2. Formula calculation, to process
- 3. 1-2-3+4+5-6-7+8+9-10…… +What is the formula of 2008?
- 4. Simple calculation of [7 / 6 + 5 / 6] minus [5 / 8 + 5 / 6]
- 5. What's one eighth of four fifths? The formula is ()
- 6. Simplified formula | - 5A + | - A / 6 "|" is the sign of absolute value
- 7. 102 * 76 = () (simple calculation)
- 8. How to simplify the formula with absolute value
- 9. Simplification of absolute value formula |b-a|+|a|+|a-b|+| |b|-|a| |=? A is a negative number, B is a positive number, and the absolute value of a is greater than B ________________________ a. Please simplify and explain the method,
- 10. Simple calculation of 28 * 55-28 + 28 * 46
- 11. Which of the following numbers are multiples of 2? Which numbers are multiples of 5? Which numbers are multiples of two and multiples of five? 35、60、57、100、95、34450、375、86、43、150、320.
- 12. Prove that 5 ^ 60-1 is a multiple of 56
- 13. 12+21=33=11X(1+2) 23+32=55=11x(2+3) 59+95=154=11x(5+9) Write a similar equation for two digits with ten digits A and one digit B?
- 14. Observe the following formulas: 12 + 21 = 33 = 11 × (1 + 2) 23 + 32 = 55 = 11 × (2 + 3) 59 + 95 = 154 = 11 × (5 + 9) Write a similar equation for two digit numbers with ten digits A and one digit B. according to this explanation, can you add the sum of any two digit number and the original number after transposing the position of any two digit number and ten digit number to the original number and divide it by 11? Calculate (- 4) △ 2, 4 △ 2, (- 4) △ 2. When you think a and B are rational numbers (B ≠ 0), is the following formula true? What rules can be summed up from this? ①-a/b=a/-b=- (a/b) ②-a/-b=a/b
- 15. How to do 56-7 = () - 1?
- 16. I'm good at Chinese and English. I can't do anything else. I should choose essays or science. The results of the senior high school entrance examination are as follows: Chinese 116, English 100, mathematics 79, physics 56, Chemistry 54, geography 52, biology 60, politics 56, history 54
- 17. Chinese 111.5 mathematics 129 English 110 arts and Sciences?
- 18. At: 42.44.44.46.48.48.48.50.51.51.56 Average is: () Median is () Mode is ()
- 19. How many parts of a square decimeter is 9 square centimeter?
- 20. To make a drawer that is 5 decimeters long, 3 decimeters wide and 1.5 decimeters high, how many square decimeters of wood is needed, and the thickness of the wood is ignored