Mental Math Study Hacks
Which is better, solving algebra in your head, or using a calculator to do it assuming you get both right. Well the answer's the same, but by doing it in your head you get a visceral grip on the answer. You feel the numbers in a way using a calculator doesn't give you. This assists in building your number intuition and science intelligence.
Many great scientists were also great number crunchers.
There are many math tricks you can learn to make mental math accessible. If you look in your library you'll find several.
Here's one we recommend:
Counting on Fingers Math Hack
DR: I completed university with advanced core science subjects without every learning my multiplication tables above the 5 times table. I just use my fingers as a calculator. Take a look at this video to see how you can too.
And here's a way to calculate in binary like a modern computer. You'll be stunned how easy it is: