because when you multiply by 2 you are just doubling the number being multiplied by two.
example: 5x2=10 5+5=10
Doubling is the same as multiplying by two. The two actions are the same.
Adding doubles can help you multiply by 2 through the property of commutativity in multiplication. By adding two equal numbers together (doubles), you are essentially multiplying one of the numbers by 2. For example, 5 + 5 = 10, which is the same as 5 x 2 = 10. This strategy can simplify multiplication problems and help build a deeper understanding of the relationship between addition and multiplication.
The circumference also doubles.
-4
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
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.