Me this is a very very big find the number patterns
1. 80,40,20 _,5
2. 7,5,15,13,
3. 90,30,,120
4. 15,25,,165
5. 56,60,20, 12,4
6. 6.5,5.5,4.5,3.5, _, _
7. 15,14,,0

1. 10

2. 37, 111

3.60

4.75

5.28

6.2.5, 1.5

7.9

Step-by-step explanation:

1. half the numbers every time

2. the pattern is subtract 2, then on the next number multiply by three

3. divide by three then on the next number multiply by 6

4. add 10, then on the next number add 20, then on the next number add 30 and so on

5.add 4 then on the next number divide by 3

6. subtract 1

7. subtract 1, then on the next number subtract 2, then on the next number subtract 3 and so on

the 1st digit is in the 100s n its 1

step-by-step explanation:

3,589÷18 = 199.389

so the first digit of the quotient is in the 100s n its 1