Curated Tumblr

4098 readers

396 users here now

For preserving the least toxic and most culturally relevant Tumblr heritage posts.

Image descriptions and plain text captions of written content are expected of all screenshots. Here are some image text extractors (I looked these up quick and will gladly take FOSS recommendations):

-web

-iOS

-android

Don't be mean. I promise to do my best to judge that fairly.

founded 2 years ago

MODERATORS

[email protected]

657

Hungry 9 (lemmy.likes.cat)

submitted 3 months ago by [email protected] to c/[email protected]

137 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] stankmut 11 points 3 months ago

The difference would just be how you think of the process. I sometimes shuffle around the numbers to make math easier, but the shortcut for adding 9s just feels different. Instead of 9+7 = 10 + 6, it's more like 9+7 = 17-1. It feels less like solving it with math and more like using a cool trick, since you didn't really use addition to solve the addition problem.