Answers

Add 70/18 and 72/40

1^st number: 3 16/18, 2^nd number: 1 32/40

70/18 + 72/40 is 256/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 18 × 20 = 360,
   70/18 = 70 × 20/18 × 20 = 1400/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   72/40 = 72 × 9/40 × 9 = 648/360
4. Add the two like fractions:
   1400/360 + 648/360 = 1400 + 648/360 = 2048/360
5. 2048/360 simplified gives 256/45
6. So, 70/18 + 72/40 = 256/45
   In mixed form: 531/45

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