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\[47+42\]
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−
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<
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"(x+1)/2+4=7"
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47+42
47+42
47+42
Available Methods
Algorithm
Partial Sum
Decomposition
1
Use the algorithm method.
4
7
+
4
2
8
9
2
Therefore,
47
+
42
=
89
47+42=89
4
7
+
4
2
=
8
9
.
89
89
8
9
Done
89
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