Simple calculation of fifth grade decimal addition and subtraction

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1. Who can help me out a few simple operations? Fifth grade decimal addition and subtraction Give it to me right away! Five points if you like
2. I want the fifth grade mathematics decimal addition and subtraction method simple calculation
3. Fifth grade mathematics book volume 121 page 5 with equation solution must be!
4. Recursive equation calculation [easy operation]: 5.6 △ 0.125
5. 1、1/0.1/0.01/0.001/．．．/0.00000000001 2、2005+200.5+20.05+2.005 3、（9991*1999.1999+9991.9991*1999）/2.0002 4、〔2.4*?+（56/7-1/0.25）〕*6.5＝104 5、（1+1.2）+（2+1.2*2）+（3+1.2*3）+．．．+（100+1.2*100） The faster the better! Can calculate a problem is a problem! KKKKKKKKKKKKKKKKK!
6. Simple calculation of fifth grade decimals 20, not integers, fractions. Just decimals,
7. Mathematics fifth grade decimal addition and subtraction multiplication and division mixed simple solution 2.36 except [2-0.08 × (2.08 + 8.32 + 250 × 0.04)] The top one is off It's all simple 4.65×7.6+3.4×4.65-4.65 3.4×4.3+3.7×3.4+3.4 3q, SF answer is very good, is the first question Please
8. Simple calculation of decimals 15×11.1÷37.5÷37 It's the process that matters
9. Who has the oral arithmetic problem of decimal multiplication and division?
10. Seek 20 oral arithmetic at the level of sixth grade (with answers) It's going to be with scores
11. Mixed decimal operation To 100 oral, 10 mixed operations, 10 simple operations, 5 vertical calculation, urgent
12. As shown in the figure, in the triangular prism abc-a1b1c1, the side edge Aa1 ⊥ bottom surface ABC, ab ⊥ BC, D is the midpoint of AC, A1A = AB = 2. (1) prove: Ab1 ∥ plane BC1D; (2) through point B, make be ⊥ AC at point E, prove: straight line be ⊥ plane aa1c1c1c (3) if the volume of pyramid b-aa1c1d is 3, calculate the length of BC
13. If vector p1p = - 2 / 5, vector PP2, let vector p1p2 = λ vector PP1, then the value of λ is
14. In known trapezoidal ABCD, AD / / BC, AC, BD intersect at O, passing through o as parallel line of ad intersects AB at m, intersects CD at n, and Mo = N0
15. As shown in the figure, ⊙ o is the circumscribed circle of the quadrilateral ABCD, with the center o on ad, OC ∥ ab. (1) prove that AC bisects DAB; (2) if AC = 8, ad: BC = 5:3, try to find the radius of ⊙ o
16. The product of two prime numbers is 99. Find the sum of these two prime numbers
17. Given that a and B are two of the equations x ^ 2 + (M + 2) x + 1 = 0, then the value of (a ^ 2 + Ma + 1) (b ^ 2 + MB + 1) is
18. If x > 1, Y > 1 and X + y = 20, then the maximum value of lgx + lgY is?
19. Let A1, A2, A3 and an be positive numbers, and prove the inequality (a1 + A2 +. + an) (1 / A1 + 1 / A2 +. + 1 / an) ≥ n & # 178;
20. (2^2+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1) It should be simple