Question

tính nhanh : 10 : 0,5 + 4 : 0,25 + 8 : 0,125

Answer 1

\(10:0,5+4:0,25+8:0,125\\ =10:\dfrac{1}{2}+4:\dfrac{1}{4}+8:\dfrac{1}{8}\\ =10\times2+4\times4+8\times8\\ =20+16+64\\ =20+\left(16+64\right)\\ =20+80\\ =100\)

Answer 2

\(10:0,5+4:0,25+8:0,125\)

\(=10:\dfrac{1}{2}+4:\dfrac{1}{4}+8:\dfrac{1}{8}\)

\(=10\times2+4\times4+8\times8\)

\(=20+16+64\)

\(=100\)