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Explain why it makes sense to multiply when changing from a larger unit to a smaller?
because you have to multiply to break it down into a smaller number
What is 2 3x5?
The expression (2 \times 3 \times 5) equals (30). To break it down, first multiply (2) by (3) to get (6), and then multiply (6) by (5) to arrive at the final result of (30).
Multiply using distributive property 4 times 38?
Oh, what a happy little math problem we have here! To multiply 4 by 38 using the distributive property, you can break it down like this: 4 x (30 + 8). First, multiply 4 by 30 to get 120, then multiply 4 by 8 to get 32. Finally, add those results together to get 152. Happy multiplying!
How do you work out products of prime numbers?
You multiply them.You multiply them.You multiply them.You multiply them.
How can you multiply and divide in your head without using a calculator?
For multiplication, just break it down into small bits in pieces, especially easy numbers like 2, 3, 5, 10, and 12. And then just multiply those instead. If needed, you can also use this: ac + bc = c(a+b) For example, 12 * 320 = 12 * 4 * 8 * 10, which is 48 * 8 * 10. Okay now, you have to multiply 48 and 8! Then you break that down. 48 * 8 = (40 * 8) + (8 * 8). That is 320 + 64, or 384. Then multiply that by 10. You get 3840! It may take some practice, but when you succeed, you will be amazing! I have to say, pretty much the same for division.
