Question

0,25*843+0,25-843:2

 

Answer 1

   0,25*843+0,25-843:2

= (0,25*843)+0,25-(843:2)

= 210,75+0,25-421,5

= -210,5

Answer 2

\(0,25.843+0.25-\frac{843}{2}\)

\(=0,25.\left(843+1\right)-\frac{843}{2}\)

\(=\frac{1}{4}.844-\frac{843}{2}\)

\(=\frac{1}{2}.422-\frac{1}{2}.843\)

\(=\frac{1}{2}.\left(422-843\right)\)

còn bao nhiêu tính nốt giùm mk nha