Tìm x:
\(\displaystyle a) \;x \times {2 \over 5} = {4 \over 7}\)
\(\displaystyle b) \;x:{6 \over {11}} = {{44} \over 9}\)
a)
\(\eqalign{ & x \times {2 \over 5} = {4 \over 7} \cr & \,\,\,\,\,\,\,x = {4 \over 7}:{2 \over 5} \cr & \,\,\,\,\,\,\,x = {4 \over 7} \times {5 \over 2} \cr & \,\,\,\,\,\,\,x = {{10} \over 7} \cr}\)
b)
\(\eqalign{ & x:{6 \over {11}} = {{44} \over 9} \cr & \,\,\,\,\,\,\,\,x = {{44} \over 9} \times {6 \over {11}} \cr & \,\,\,\,\,\,\,\,x = {8 \over 3} \cr}\)
-- Mod Toán lớp 5
Copyright © 2021 HOCTAP247