Notice this pattern when working with powers of 2: 2^0 2^1 2^2 2^3 2^4 ? 2 4 8 16
Every time we increase the power we multiply by 2. Or reading the pattern backwards, every time we decrease the power we divide by 2. What is 2 divided by 2? It is 1! So 2^0 = 1 to finish the pattern: 2^0 2^1 2^2 2^3 2^4 1 2 4 8 16
Try it with 3 or with 5 or with any number! You'll see that the pattern holds!
ok so regrouping is when the top number of a equation is like for EXAMPLE 3 minus 6 ok so 3 is lower than six so the number on the left side you cross that out and you add it to the number that was on top which would make it 13 in this case so 13 minus six is 7 and that’s regrouping