Multiply:
−78\dfrac{-7}{8}8−7 and 4
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−78×41=−7×48×1=−288=−72=−312\dfrac{-7}{8} \times \dfrac{4}{1}\\[1em] =\dfrac{-7 \times 4}{8 \times 1}\\[1em] =\dfrac{-28}{8}\\[1em] =\dfrac{-7}{2}\\[1em] =-3\dfrac{1}{2}8−7×14=8×1−7×4=8−28=2−7=−321
Hence, −78×4=−312\dfrac{-7}{8} \times 4 = -3\dfrac{1}{2}8−7×4=−321
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Multiply
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−710\dfrac{-7}{10}10−7 and −815\dfrac{-8}{15}15−8
