Question

tính nhanh

11/15 x 4/5 + 11/15

Answer 1

\(\dfrac{11}{15}\times\dfrac{4}{5}+\dfrac{11}{15}\)
\(=\dfrac{11}{15}\times\left(\dfrac{4}{5}+1\right)\)
\(=\dfrac{11}{15}\times\dfrac{9}{5}\)
\(=\dfrac{33}{25}\)

Answer 2

\(\dfrac{11}{15}\times\dfrac{4}{5}+\dfrac{11}{15}\\ =\dfrac{44}{75}+\dfrac{11}{15}\\ =\dfrac{44}{75}+\dfrac{11.5}{15.5}\\ =\dfrac{44}{75}+\dfrac{55}{75}\\ =\dfrac{99}{75}\\ =\dfrac{33}{25}.\)

Answer 3

=1115×(45+1)=1115×(45+1)
=3325