Mental maths is when you do calculations in your head instead of writing them down. Sometimes, it's just as quick to do calculations in your head as it is to write down every step. You can add and ...
NARRATOR:'Ready, steady, Number Squad. Bring on the numbers. Here's Rodd.' RODD:Hey, Number Squad! Thank you, you guys are so cool. Hey! It's good to see you. Check it out. I'm packing for a mountain ...
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