19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...

NARRATOR: Yes, that is quite a hard sum. It might be easier if we separate the 17 into a 10 and a 7, and the 14 into a 10 and a 4. That gives us a 10, a 10, a 7 and a 4. Let's start by adding the ...

A simple finger trick for the 11 times table is helping secondary school students aged 12 to 16 improve mental arithmetic ...

Google DeepMind is not building a better gamer; it is building a better brain. The Scalable Instructable Multiworld Agent ...