Make sure you know you know your basic multiplications of one-digit number (like 8 x 7) with “Numbers Jugging – Times without the Tables.”
This lesson takes us to multiplication by two of three-digit numbers.
Only one of the digits will be 5 or greater, meaning there will only be one carry, at most.
Examples:
473 x 2 (You’d have to carry when you multiply the seven.)
2 x 318 (You’d have to carry when you multiply the eight.)
We will also be multiplying three-digit numbers by two, in our heads, with only one of the digits causing us to carry.
We’ll earn a simple way of memorizing a number, by seeing the shape of the digits in the air, tracing it with our fingers, using the example 263 * 2 .
Math is like reading – if you do it a lot, you get better at it.
Practice in various places, at scattered times, and you will always be in mental shape to multiply.
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