Half + quarter equals half + quarter + eighth equals half + quarter + eighth equals half + quarter + eighth equals sixteenth 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 +. + 1 / 128=

Half + quarter equals half + quarter + eighth equals half + quarter + eighth equals half + quarter + eighth equals sixteenth 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 +. + 1 / 128=

3/4
7/8
15/16
one hundred and twenty-seven-128ths

9.1 * 4.8 * 7 and one-half ／ 1 / 4 ／ 1.3 ／ 1.6

9.1 * 4.8 * 7 and one-half ／ 1 / 4 ／ 1.3 ／ 1.6
=（9.1÷1.3）×（4.8÷1.6）×15/2×4
=7×3×30
=630

|1 / 10-9 / 10 + 1 / 10-9 / 10 + 1 / 10-8 / 10 + 1 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 +|1 / 3-1 / 2 + | - 1 / 2|

|1 / 10-9 / 10 + 1 / 10-9 / 10 + 1 / 10-8 / 10 + 1 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 / 10-9 +|1 / 3-1 / 2 + | - 1 / 2|
=1/9-1/10+1/8-1/9+1/7-1/8+1/6-1/7+1/5-1/6+1/4-1/5+1/3-1/4+1/2-1/3+1-1/2
=1-1/10
=9/10

If a times two fifths equals B times three fifths, (A and B are not equal to 0), then a is greater than B, right?

If a is a positive number, then a > b; if a is a negative number, then a > B