Question

Bài 2: Thực hiện phép tính:

a)\((4\frac{1}{9}+3\frac{1}{4}).2\frac{1}{4}+2\frac{3}{4}\)

b) \(1+(\frac{9}{10}-\frac{4}{5})\div3\frac{1}{6}\)

c) \((-7+|13|)-\left(13-|-7|-25\right)-\left(25-|-10|-9\right)\)

Answer 1

a) \(\left(4\frac{1}{9}+3\frac{1}{4}\right)\cdot2\frac{1}{4}+2\frac{3}{4}\)

\(=7\frac{13}{36}\cdot2\frac{1}{4}+2\frac{3}{4}\)

\(=16\frac{9}{16}+2\frac{3}{4}\)

\(=19\frac{5}{16}\)

b)\(1+\left(\frac{9}{10}-\frac{4}{5}\right)\div3\frac{1}{6}\)

\(=1+\frac{1}{10}\div\frac{19}{6}\)

\(=1+\frac{3}{95}=1\frac{3}{95}\)

MK LÀM CHO BẠN 2 Ý THÔI NHA. 

K MK NHA. CHÚC BN HỌC TỐT. ^_^

Answer 2

c) \(\left(-7+|13|\right)-\left(13-|-7|-25\right)-\left(25-|-10|-9\right)\)

\(=-7+13-13+7+25-25+10+9\)

\(=\left(-7+7\right)+\left(13-13\right)+\left(25-25\right)+10+9\)

\(=0+0+0+10+9=10+9=19\)

MK LÀM XONG RỒI. K MK NHA. KB