Answer:
Step-by-step explanation:
9 + 4 = 13 Two minus' make a plus
14-9 = 5 this is just subtraction
-4 + 5 = 1 two minus's make a plus.
-7-9 = -16
What number comes after 12 24 72 to 288 first please explain that again and second 11 comes after 12 and 23 comes after 24 and 71 comes after 72 hope this helps
So it is distance from zero so 6+15=21
1 2 3 4 5 6 7 8 9 10 (11) 12 13 14 15 16 17 18 19 20 21
eliminate one from each side till you find the middle
the least common multiple is 210