please explain how to use doubles plus 1 and doubles minus 1
This is a method for early learners to use to add.
when adding two consecutive numbers, double the lower number, add 1
2+3=4+1=5
7+8=14+1=15
or, double the higher number, and subtract one.
3+2=6-1=5
7+8=16-1=15
11+10=11-1=21
11+10=20+1=21
0+1=1
Certainly! "Doubles plus 1" and "doubles minus 1" are basic mathematical operations that involve adding or subtracting 1 after doubling a given number. Here's an explanation on how to use these operations:
1. Doubles Plus 1:
- Start with a number.
- Multiply the number by 2 (double it).
- Add 1 to the result.
For example, let's say we have the number 5:
- Double the number: 5 x 2 = 10.
- Add 1 to the result: 10 + 1 = 11.
So, "doubles plus 1" of the number 5 is 11.
2. Doubles Minus 1:
- Start with a number.
- Multiply the number by 2 (double it).
- Subtract 1 from the result.
Continuing with the previous example of the number 5:
- Double the number: 5 x 2 = 10.
- Subtract 1 from the result: 10 - 1 = 9.
Therefore, "doubles minus 1" of the number 5 is 9.
You can use these operations with any number. Just remember to follow the steps of doubling the number and then either adding or subtracting 1 to get your final result.