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Question
Circle the correct division fact (by using method of casting out nine).
7785 ÷ 9 = 865
Solution
7785 ÷ 9 = 865
7 + 7 + 8 + 5 ÷ 0 = 8 + 6 + 5
27 ÷ 0 = 19
27 = 19 × 0
9 = 0
0 = 0
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Complete the following sequence.
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What if someone gives you to add ten numbers together?
Did you notice some pattern in the answers?
Take the first two odd numbers. Now add them, see what you get. Now, at every step, add the next odd number.|
How far can you go on?
Look at this pattern of numbers and take it forward.
1 = 1 × 1
121 = 11 × 11
12321 = 111 × 111
1234321 = ?
