3.
Try the pattern for 143 x 7 x 1, 143 x 7 x 2 ....
How would we multiply the numbers 13680347, 35702369 and 25692359 with 9
mentally? What is the pattern that emerges.
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Answer:
143 × 7 × 1 = 1001
( 143 × 7 ) × 2 = 1001 × 2 = 2002
13680347 × 9 = 123123123
35702369 × 9 = 321321321
25692359 × 9 = 231231231
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