4+2+1=7 - Blog Posts

75 8×2 (8+8)= 16 so -1 (8+7) will be 15 carry over the 1 4+2+1=7

75 4+2+1=7 7+8=15 immediate panic at seeing a math problem ok brain we can do this carry the 1 that’s a guess I have a degree in public history so I don’t have to do math