Answers

Add 42/70 and 21/70

42/70 + 21/70 is 9/10.

Steps for adding fractions

1. Add the two fractions:
   42/70 + 21/70 = 42 + 21/70 = 63/70
2. 63/70 simplified gives 9/10
3. So, 42/70 + 21/70 = 9/10

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