Use properties of addition to add whole numbers

Two whole numbers can be added in either order because the result is the same. This is called commutative property of addition. There are other properties that can help you add whole numbers.

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Questions #: 9
Time: 10 minutes
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The order in which whole numbers are added does not change their sum. This is called

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2 + 8 = 8 + 2

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The way in which whole numbers are grouped does not change their sum. This is called

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(2 + 5) + 4 = 2 + (5 + 4)

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Find the sum

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98 + (2 + 17) = (1)

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The sum of any whole number and 0 is that whole number. This is called

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3+ 0 = 3

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Add

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3 + 5 + 17 + 2 + 3

Answer = (1)

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Add

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\[
\begin{array}{r}
\phantom{+}2\phantom{0}0\phantom{0}1 \\
+\phantom{0}8\phantom{0}6\phantom{0}7 \\
+\phantom{0}0\phantom{0}4\phantom{0}9 \\
\hline
\\
\end{array}
\]

Answer = (1)

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0
sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC
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