Đặt tính và tính dưới dạng phân số 1/2+1/3+1/6= 5/12+5/6+3/4 1-(1/5+1/2)= 11/07/2021 Bởi Daisy Đặt tính và tính dưới dạng phân số 1/2+1/3+1/6= 5/12+5/6+3/4 1-(1/5+1/2)=
I)1/2+1/3+1/6=3/6+2/6+1/6 =6/6 =1 II)5/12+5/6+3/4 =5/12+10/12+9/12 =24/12 =2 III)1-(1/5+1/2) =1-(2/10+5/10) =10/10-7/10 =3/10 Bình luận
`\frac{1}{2}+\frac{1}{3}+\frac{1}{6}=\frac{3}{6}+\frac{2}{6}+\frac{1}{6}=\frac{3+2+1}{6}=\frac{6}{6}=1` `\frac{5}{12}+\frac{5}{6}+\frac{3}{4}=\frac{5}{12}+\frac{10}{12}+\frac{9}{12}=\frac{5+10+9}{12}=\frac{24}{12}=2` `1-(\frac{1}{5}+\frac{1}{2})=1-(\frac{2}{10}+\frac{5}{10})=1-\frac{7}{10}=\frac{10}{10}-\frac{7}{10}=\frac{3}{10}` Bình luận
I)1/2+1/3+1/6=3/6+2/6+1/6
=6/6
=1
II)5/12+5/6+3/4
=5/12+10/12+9/12
=24/12
=2
III)1-(1/5+1/2)
=1-(2/10+5/10)
=10/10-7/10
=3/10
`\frac{1}{2}+\frac{1}{3}+\frac{1}{6}=\frac{3}{6}+\frac{2}{6}+\frac{1}{6}=\frac{3+2+1}{6}=\frac{6}{6}=1`
`\frac{5}{12}+\frac{5}{6}+\frac{3}{4}=\frac{5}{12}+\frac{10}{12}+\frac{9}{12}=\frac{5+10+9}{12}=\frac{24}{12}=2`
`1-(\frac{1}{5}+\frac{1}{2})=1-(\frac{2}{10}+\frac{5}{10})=1-\frac{7}{10}=\frac{10}{10}-\frac{7}{10}=\frac{3}{10}`