Doubling is the same as multiplying by two. The two actions are the same.
The circumference also doubles.
-4
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
Because, if you want to multiply say 2*4=8 that is the same as doing 4+4=8 or 4 two times. It's the same with all numbers!
Doubling is the same as multiplying by two. The two actions are the same.
Anything times two equals the thing added to itself. 33 x 2 = 33 + 33
you multiply 5 by 2 which is ten or you think of adding 5 two's or adding 2 fives.
The circumference also doubles.
-4
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
It will help when you are adding and subtracting fractions.
Because, if you want to multiply say 2*4=8 that is the same as doing 4+4=8 or 4 two times. It's the same with all numbers!
-100
Multiply it by 2 as for example 3+3 = 6 which is the same as 2*3 = 6
parent
For dividing they spelled it out for example, two-sevenths was "duae septimae" and three-eighths was "tres octavae." For multiplying they put horizontal a dash or line over the numeral and multiply by a thousand ...... I believed there was nor subtracting or adding just adding on or taking off numerals.