4.7 * 11.3 + 51 * 1.13-0.9 * 113 how to use the common factor method to calculate easily

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• 1. How about 7 out of 8-1 out of 17 + 9 out of 8-17 out of 16
• 2. Ask help 48 times 12 add 16 times 64 simple method how to calculate
• 3. Simple calculation: (11 / 12-7 / 6 + 3 / 4-13 / 16) × (- 48) （-11）÷（-1/13）×（-13） There must be a process, and it's very simple It must be simple, not dead
• 4. 5 / 9 * 80% * 3 / 4,3 / 8 * 25% + 4 / 8 * 1 / 4,48 * (11 / 12-12.5% - 1 / 6), 7 / 8-7 / 8 * 20% can be calculated simply
• 5. Simple calculation: 6.2 * 12.5 * 25 * 8
• 6. A simple method is used to calculate: 7.74 × (2.8-1.3) + 1.5 × 2.26
• 7. 3.17-2.74 + 4.7 + 5.26-0.26 + 6.3 simple calculation
• 8. 3.17-2.74+4.7+5.29-0.26+6.3
• 9. 365-26-74 simple operation
• 10. 2.74 + 12.6 + 7.4 + 3.26 = simple calculation
• 11. Using the method of extracting common factor to calculate Using the square difference factorization factor 1 / to decompose the following formula 1. M + 2 power of a - (2b-c) 2. M power of a 3. A (x-1) + 4 (1-x) 4. (x + y + Z) - (X-Y-Z) 5. (3x + 2x-8) - (x-2x-8)
• 12. Using the method of quoting factor: 7 / 16 of 16.8 * 32 + 7.6 * 7 / 16
• 13. The method of raising common factor# 【1】 In the following groups of algebras, () ① 2 AB and a + B; 2 5 Mn and - M; 3 xy and - XY; 4 2x-y and 2XY A.①② B.②③ C.③④ D.①②③④ 【2】 The common factor of: integral 15x & # 178; YZ & # 179; and - 21xyz ^ 5 is_______________ 【3】 : factorize the polynomial 3A (X-Y) - B (X-Y), the common factor of which is () A.3a-b B.3（x-y） C.x-y D.3a+b 【4】 The method of quoting common factor is used to calculate 3 879×58+25×3 879+17×3879 【5】 The common factor of polynomial 14abx-8ab & # 178; X + 2aX is_____________ 【6】 Decomposition factor: a (a-b) - A + B=_________ 【7】 If X-Y = 1, xy = 5, then x & # 178; y-xy & # 178=__________ 【8】 If a + B = 3, a & # 178; B + AB & # 178; = 1, then ab=_________
• 14. Two exercises of common factor extraction in mathematics of grade one in junior high school 1. Using factorization to simplify polynomial 1 + X + X (1 + x) + X (1 + x) ^ 2 + +x(1+x)^2009. 2. Please explain why 13 ^ 2010-2 * 13 ^ 2009 + 5 * 13 ^ 2008 is an integral multiple of 37 I don't have much time to do a lot of homework
• 15. 20°30′=_______ ° 52°45′- 32°46′=_______ °_____ ′ 18.3°+ 26°34′=______ °_____ ′
• 16. In order to find out the opinions of the seventh grade students on the three new year's Day activities, a survey was conducted among all the students. The results showed that 115 students chose the first one, 62 students chose the second one, 40 students chose the third one, and 8 students abstained to find out the percentage and degree
• 17. (1) 3 * (- 12) - (- 5) * 6 + 6 = 0 (2) 6 * (- 6 + 5 + 1) = 0 (3) by calculating (1), (2) what do you find after two questions? (4) calculate according to your findings: - 3.14 * 35.2 + 6.28 * (- 23.3) - 1.75 * 36.4 = teach me this question! Write down the meaning, that's better!
• 18. Multiplication and division of integral in simple mathematical operation 1： 1 + 1 / 3 + 1 / 3 & sup2; + +1 / 3 to the 10th power =) 2： Sn = 1 / 2 + 2 / 4 + 3 / 8 + 4 / 16 + +The n-th power of 11 / 2 is compared with the size of 2 (process that needs SN to calculate)
• 19. Mathematics -- recursive equation calculation （450＋28×12）×5
• 20. (2.7×6.78+6.78×7.2)÷0.99 The product of numbers a and B is 0.44. If the number a is 5 times larger, then the product of numbers a and B is 0.44（