Question

tính một cách hợp lí

(-1/3+5/6) x 10 -7

Answer 1

\(\left(-\dfrac{1}{3}+\dfrac{5}{6}\right)\cdot10-7\)

\(=\left(-\dfrac{2}{6}+\dfrac{5}{6}\right)\cdot10-7\)

\(=\dfrac{3}{6}\cdot10-7=5-7=-2\)

Answer 2

\(\left(\dfrac{-1}{3}+\dfrac{5}{6}\right).10-7\)
\(=\left(\dfrac{-2}{6}+\dfrac{5}{6}\right).10-7\)
\(=\dfrac{3}{6}.10-7\)
\(=\dfrac{1}{2}.10-7\)
\(=5-7\)
\(=-2\)