Toán 11/5 – 11/15 = ??? 5/3 – 4/5 =??? 6/7 – 6/5 =???? 03/12/2021 By Valentina 11/5 – 11/15 = ??? 5/3 – 4/5 =??? 6/7 – 6/5 =????
Đáp án: 11/5-11/15 =11×3/5×3-11/15 =33/15-11/15 =33-11/15 =22/15 5/3-4/5 =5×5/3×5-4×3/5×3 =25/15-12/15 =25-12/15 =13/15 6/7-6/5 =6×5/7×5-6×7/5×7 =30/35-42/35 =30-42/35 =-(42-30)/35 =-12/35 HỌC TỐT~~ Trả lời
$\dfrac{11}{5} – \dfrac{11}{15} = \dfrac{33}{15} – \dfrac{11}{15} = \dfrac{22}{15} $ $ \dfrac{5}{3} – \dfrac{4}{5} = \dfrac{25}{15} – \dfrac{12}{15} = \dfrac{13}{15} $ $\dfrac{6}{7} – \dfrac{6}{5} = \dfrac{30}{35} – \dfrac{42}{35} = \dfrac{-12}{35} $ Trả lời
Đáp án:
11/5-11/15
=11×3/5×3-11/15
=33/15-11/15
=33-11/15
=22/15
5/3-4/5
=5×5/3×5-4×3/5×3
=25/15-12/15
=25-12/15
=13/15
6/7-6/5
=6×5/7×5-6×7/5×7
=30/35-42/35
=30-42/35
=-(42-30)/35
=-12/35
HỌC TỐT~~
$\dfrac{11}{5} – \dfrac{11}{15} = \dfrac{33}{15} – \dfrac{11}{15} = \dfrac{22}{15} $
$ \dfrac{5}{3} – \dfrac{4}{5} = \dfrac{25}{15} – \dfrac{12}{15} = \dfrac{13}{15} $
$\dfrac{6}{7} – \dfrac{6}{5} = \dfrac{30}{35} – \dfrac{42}{35} = \dfrac{-12}{35} $