The value of b must be 8
To add 26 and 17 using the common core method with mental math, you can break the numbers into tens and ones. First, add the tens: 20 (from 26) plus 10 (from 17) equals 30. Next, add the ones: 6 (from 26) plus 7 (from 17) equals 13. Finally, combine the two results: 30 plus 13 equals 43. Thus, 26 plus 17 equals 43.
math
commutative property
1 plus 1 equals 2
The Commutative Property
x=62
The answer is 168. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
math
22.13 You can figure this out by using mental math if you are a math wizard or you could do it on paper by lining up the decimal points and addind like you would normally. A calculator is also a good option.
1 plus 1 equals 2
commutative property
301 + 173 + 427 = 301 + (173 + 427) = 301 + 600 = 901
140. That's simple mental math.
The Commutative Property
Uhhh . . let me guess . . . 2+3 = 10 if you're using Base 5 math?
5
4 (four)