Find the rule (1) 1.2,2.5,3.8, () () (2) 3,1.5,0.75, ()

Find the rule (1) 1.2,2.5,3.8, () () (2) 3,1.5,0.75, ()

(1) 1.2,2.5,3.8, (5.1) (6.4) last number = previous number + 13 (2) 3,1.5,0.75, (0.375) last number = previous number / 2

A simple method of 11x22 + 0.22x3300 + 330x4.4

11x22+0.22x3300+330x4.4
=2*11*11+2*3*11*11+3*4*11*11
=(2+6+12)*11^2
=20*121
=2420

Simple calculation question 11x22 + 0.22x3300 + 330x4.4

11x22 + 0.22x3300 + 330x4.4 = the square of 11 × 11 × 2 + 11 × 0.02 × 11 × 300 + 11 × 30 × 11 × 0.4 = 11 × [2 + 6 + 12] = 121 × 20 = 2410

11x22+0.22x3300+33x4.4

1113.2

How to calculate 11x22 + o.22x33oo + 33ox4.4 with simple method

11×22+0.22×3300+300×4.4
=11×22+22×33+30×0.2×22
=11×22+22×33+6×22
=(11+33+6)×22
=50×22
=50×2×11
=100×11
=1100

Find the rule: 3,1,1 / 3,1 / 9, ()

A: it should be 1 / 27
After careful observation, this sequence is obviously a decreasing sequence, and the former is three times of the latter. To sum up, 1 / 27 should be filled in the blank

Find the rule 12,4,1 / 3, (), ()

Rule 12, 4, one third, one twelfth, one fourth

The law of numbers: 1, - 2,3, - 4,5, - 6,7
1: Use the letter containing n to express 2: what is his 100th number? Is 3:2010 the number in this column? If so, what is it?

1. (- 1) ^ (n + 1) * N 2. - 100 3

Find the rule 1,4,5,4,6,4

The rule is as follows
Even numbers are all four
The number on the odd number is the sum of the first two odd numbers from the number on the third odd number
For example, 6 = 1 + 5
If it's 11, 4, 17, 4, 28, 4

Find the rule: 1, 2, 3, 2, 3, 4, 3, 4, 5, 5, 6

1、2、3、2、3、4、3、4、5、（4、）5、6.
The penultimate number seems to be missing
The rule is a group of three, which is a continuous natural number. The first number of the nth group is n
When there are 99 numbers, there are 33 groups ahead. 100 is the first number in group 34, so it is 34