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melomori [17]
3 years ago
15

What addition doubles fact can help you solve 4 +5?

Mathematics
2 answers:
DENIUS [597]3 years ago
6 0
4+4= 8 + 1=9
2+2=4 + 5=9
goldfiish [28.3K]3 years ago
4 0
4 + 4 can help. Then add one.
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