How can five fourths times nine eleven plus thirteen fourths times five eleven be easily calculated? Five minutes, quick! And three quarters by one fifth plus three quarters by two fifths plus 0.75 by three fifths minus three fourths

How can five fourths times nine eleven plus thirteen fourths times five eleven be easily calculated? Five minutes, quick! And three quarters by one fifth plus three quarters by two fifths plus 0.75 by three fifths minus three fourths

=5/14x9/11+13/14x5/11
=5/11x9/14+5/11x13/14
=5/11x(9/14+13/14)
=5/11x22/14
=5/11x11/7
=5/7
I hope I can help you,
And three quarters by one fifth plus three quarters by two fifths plus 0.75 by three fifths minus three fourths
=3/4x1/5+3/4x2/5+0.75x3/5-3/4
=3/4x(1/5+2/5+3/5-1)
=3/4x1/5
=3/20

Simple calculation process of 7 / 9 times 5 / 13 minus 5 / 9 times 4 / 13
Ask the teacher to answer quickly