Solutions by everydaycalculation.com

13 - 910 is -1730.

- Find the least common denominator or LCM of the two denominators:

LCM of 3 and 10 is**30** - For the 1st fraction, since 3 × 10 = 30,

13 = 1 × 103 × 10 = 1030 - Likewise, for the 2nd fraction, since 10 × 3 = 30,

910 = 9 × 310 × 3 = 2730 - Subtract the two fractions:

1030 - 2730 = 10 - 2730 = -1730

Related: ^{2}/_{3}-^{9}/_{10} ^{1}/_{3}-^{18}/_{10} ^{1}/_{6}-^{9}/_{10} ^{1}/_{3}-^{9}/_{20} ^{1}/_{3}-^{27}/_{10} ^{1}/_{9}-^{9}/_{10} ^{1}/_{3}-^{9}/_{30} ^{5}/_{3}-^{9}/_{10} ^{1}/_{3}-^{45}/_{10} ^{1}/_{15}-^{9}/_{10} ^{1}/_{3}-^{9}/_{50} ^{7}/_{3}-^{9}/_{10} ^{1}/_{3}-^{63}/_{10} ^{1}/_{21}-^{9}/_{10} ^{1}/_{3}-^{9}/_{70}

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