The property which states that the grouping of addends does not change the sum
A problem-solving strategy in which bar models are used to visually organize the facts in a problem
Commutative Property of Additions
The property that states that the order in which two numbers are added does not change the sum5.
(4+5) + 2 = 4 + (5 +2)
A number close to an exact value. An estimate indicates about how much.
47 + 22 is about 70.
Identity Property of Addition
If you add zero to a number, the sum is the same as the given number.
3 + 0 =3 or 0 + 3 = 3
Ordering or grouping numbers so that they are easier to compute in your head.
Symbols that are used to groups numbers. They show which operations to complete first in a number sentence
A sequence of numbers, figures, or symbols that follow a rule or design.
2, 4, 6, 8, 10
Within the bounds of making sense.
To use place value to exchange equal amounts when renaming a number.
A missing number, or the number to be solved for.