Multiply:
−710\dfrac{-7}{10}10−7 and −815\dfrac{-8}{15}15−8
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−710×−815=−7×(−8)10×15=56150=2875\dfrac{-7}{10} \times \dfrac{-8}{15}\\[1em] =\dfrac{-7 \times (-8)}{10 \times 15}\\[1em] =\dfrac{56}{150}\\[1em] =\dfrac{28}{75}10−7×15−8=10×15−7×(−8)=15056=7528
Hence, −710×−815=2875\dfrac{-7}{10} \times \dfrac{-8}{15} = \dfrac{28}{75}10−7×15−8=7528
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−78\dfrac{-7}{8}8−7 and 4
36−7\dfrac{36}{-7}−736 and −928\dfrac{-9}{28}28−9
Evaluate:
(2−3×54)+(59×3−10)\Big(\dfrac{2}{-3} \times \dfrac{5}{4}\Big) + \Big(\dfrac{5}{9} \times \dfrac{3}{-10}\Big)(−32×45)+(95×−103)
(2×14)−(−187×−715)\Big(2 \times \dfrac{1}{4}\Big) - \Big(\dfrac{-18}{7} \times \dfrac{-7}{15}\Big)(2×41)−(7−18×15−7)
