Question

câu 11 tính nhanh 

a) 3,14 x 1/4 + 3,14 x 99 + 3,14 x 75%

Answer 1

\(a)3,14\times\dfrac{1}{4}+3,14\times99+3,14\times75\%\\ =3,14\times0,25+3,14\times99+3,14\times0,75\\ =3,14\times\left(0,25+99+0,75\right)\\ =3,14\times100\\ =314\)

Answer 2

\(3,14\cdot\dfrac{1}{4}+3,14\cdot99+3,14\cdot75\%\)

\(=3,14\cdot0.25+3,14\cdot99+3,14\cdot0.75\)

\(=3,14\cdot\left(0.25+99+0.75\right)\)

\(=3,14\cdot100\)

\(=314\)