A great multiplication strategy to have: doubling and halving

Great strategy, however the number of kids who don’t know how to double a number with 5 in the ones place is astounding. They have no idea how to halve a number with an odd digit in the tens place either

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I'm gobsmacked. I would never think of doing this. I'm taking this into the classroom on Monday--thank you!

that's really helpful tyvm!

this is an easy way to perform the multiplication quicker.. in your mind.

Yes on A & C.

OMG thank you thank you thank you. Love your tips!!

i like this method, also like the Egyptian method

I do that this way: (15x10)+(15x2)=180