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Rational Numbers — MATHS STD 7 — Question

ICSE BoardEnglish MediumSTD 7MATHSRational Numbers3 Marks
Question
Add: $\frac{-9}{-16}$ and $\frac{-11}{8}$
✓

Answer

$\frac{-9}{-16}$ and $\frac{-11}{8}=\frac{9}{16}+\frac{-11}{8}$
$ =\frac{9 \times 1}{16 \times 1}+\frac{-11 \times 2}{8 \times 2} $
$(\because$ L.C.M. of 16 and $8=16$ )
$ =\frac{9}{16}+\frac{-22}{16} $
$ =\frac{(9)+(-22)}{16}=\frac{9-22}{16}=\frac{-13}{16} $

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