By counting by 2s
because when you multiply by 2 you are just doubling the number being multiplied by two. example: 5x2=10 5+5=10
Mulitplying is really just a form of addition. Multiplying by 2 is the same as adding a number to itself (or adding doubles). For example: 4X2 is the same as 4 + 4 = 8 The X2 part of the multiplication problem means that you are adding doubles or 4 to itself. So any problem with X2 would be the same as adding doubles: 5X2 = 5 + 5 = 10 6X2 = 6 + 6 = 12 7X2 = 7 + 7 = 14 ...and so on. So if you can add doubles you already know how to multiply any number by 2.
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
As 5 = 10 ÷ 2: I usually multiply by 10 (by shifting the decimal point one digit to the right, adding a zero if it was originally at the end of the number) and then dividing by 2.
By counting by 2s
it can help you by couting by 2s
Anything times two equals the thing added to itself. 33 x 2 = 33 + 33
because when you multiply by 2 you are just doubling the number being multiplied by two. example: 5x2=10 5+5=10
Mulitplying is really just a form of addition. Multiplying by 2 is the same as adding a number to itself (or adding doubles). For example: 4X2 is the same as 4 + 4 = 8 The X2 part of the multiplication problem means that you are adding doubles or 4 to itself. So any problem with X2 would be the same as adding doubles: 5X2 = 5 + 5 = 10 6X2 = 6 + 6 = 12 7X2 = 7 + 7 = 14 ...and so on. So if you can add doubles you already know how to multiply any number by 2.
2. multiplying 2 and 2 is the same as adding 2 and 2.
The answer is "double".
you multiply 5 by 2 which is ten or you think of adding 5 two's or adding 2 fives.
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
multiply seven by 2 which is fourteen
As 5 = 10 ÷ 2: I usually multiply by 10 (by shifting the decimal point one digit to the right, adding a zero if it was originally at the end of the number) and then dividing by 2.
Since 12=10+2 We first multiply 7 by 10 to get 70 and then 7 by 2 to get 14 adding these gives us our final answer: 84