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First you just multiply 8 by 5, which is 40. Tack on two 0's at the end to get 4000.

Q: How can you use mental math to multiply 800 x 5?

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First take out the 2 zero's. then you have 8x5. Multiply then add the 2 zero's. now you have 8500 which is the answer.

You would multiply 12x5, and then just add a zero. The answer is 600.

Multiply 3 times 25 mentally (the answer is 75), and then adding three zeroes will give the total of 75,000.

Mental math! aka in ur head

optometrist use math 36 topics like subtracting adding mental math triangles and much more!

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First take out the 2 zero's. then you have 8x5. Multiply then add the 2 zero's. now you have 8500 which is the answer.

yes you can just multiply the 8 and the 5 then add all the zeros you have in the 800 to your answer. EX. 8x5=45 <-- your answer then add the 2 zeros your final answer is 4500

You would multiply 12x5, and then just add a zero. The answer is 600.

The easiest way to do this is to round each figure to the nearest ten. Once you have that, it should be an easy matter to multiply. Hope this helps

Multiply 3 times 25 mentally (the answer is 75), and then adding three zeroes will give the total of 75,000.

Mental math! aka in ur head

optometrist use math 36 topics like subtracting adding mental math triangles and much more!

yes

you just multiply

70

You can, if you wish.

Split 3000 x 25 into 3 x 1000 x 25. Figure 3 x 25, and multiply that by 1000, and there you go.