Rashi used the addition table to add doubles. She colored the sums
of doubles in green.
What...
Mathematics, 11.03.2021 20:40, kitttimothy55
Rashi used the addition table to add doubles. She colored the sums
of doubles in green.
What pattern do you see?
The sums of doubles
are odd.
The
sums of doubles
are even.
+ 1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10
2 3 4 5 6 7 8 9 10 11
3 4 5 6 7 8 9 10 11 12
4 5 6 7 8 9 10 11 12 13
5 6 7 8 9 10 11 12 13 14
6 7 8 9 10 11 12 13 14 15
7 8 9 10 11 12 13 14 15 16
8 9 10 11 12 13 14 15 16 17
9 10 11 12 13 14 15 16 17 18
The sums of doubles
are both odd and even.
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