87*5 = (90-3)*5 = 90*5 - 3*5 = 9*5*10 - 3*5 = 45*10 - 15 = 450 - 15 = 435.
That is a overly detailed description of how I would do it.
87*5 = (90-3)*5 = 90*5 - 3*5 = 9*5*10 - 3*5 = 45*10 - 15 = 450 - 15 = 435.
That is a overly detailed description of how I would do it.
87*5 = (90-3)*5 = 90*5 - 3*5 = 9*5*10 - 3*5 = 45*10 - 15 = 450 - 15 = 435.
That is a overly detailed description of how I would do it.
87*5 = (90-3)*5 = 90*5 - 3*5 = 9*5*10 - 3*5 = 45*10 - 15 = 450 - 15 = 435.
That is a overly detailed description of how I would do it.
50 what's "mental math" supposed to mean? if it just means you did it in your head, then there is no difference between mental and regular math, except that it is harder to check your work.
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.
16)87 == 5 remainder '7'.
C = ( 5/9) x (F - 32) = (5/9) x (87 - 32) = ( 5/9) x 55 Fahrenheit
17 with remainder 2.
50 what's "mental math" supposed to mean? if it just means you did it in your head, then there is no difference between mental and regular math, except that it is harder to check your work.
5 goes into 435 87 times, as 87*5=435.
5*9 = 45 so 50*90 = 4500.
times can 16 go into 87 = 5
5 with 12 remaining 87 - 12 = 75 = 15 x 5
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.
16)87 == 5 remainder '7'.
C = ( 5/9) x (F - 32) = (5/9) x (87 - 32) = ( 5/9) x 55 Fahrenheit
you do the math dog
Evenly, it doesn't. But, if you will accept decimals, 9 goes into 87 9.66666667 times.
1825
17 with remainder 2.