From 12, 13, 14 Choose seven different scores from the 49 scores, 149 and 150, and make their sum equal to 1______ 、______ 、______ 、______ 、______ 、______ 、______ ．

From 12, 13, 14 Choose seven different scores from the 49 scores, 149 and 150, and make their sum equal to 1______ 、______ 、______ 、______ 、______ 、______ 、______ ．

12. The denominators of 16, 17, 112, 120, 130, 1427 fractions have the same least common multiple, and their sum is equal to 1. So the answer is 12, 16, 17, 112, 120, 130, 142

Primary school math problem; choose seven different fractions from the 49 numbers from half to fifty so that their sum equals one

1=1/3+1/4+1/6+1/8+1/16+1/24+1/48

(2 × 3) 1 + (3 × 4) 1 + (4 × 5) 1 +. + (49 × 50) 1
Detrended form

=1/2-1/3+1/3-1/4+1/4-1/5+…… +1/49-1/50
=1/2-1/50
=24/50
=12/25

1 of 2 * 3 + 1 of 3 * 4 + 1 of 4 * 5 + 1 of 5 * 6 + +49 * 1 / 50

1 / 2 × 3 + 1 / 3 × 4 + 1 / 4 × 5 + 1 / 5 × 6 + +49 × 1 / 50
=1 / 2-3 / 1 + 1 / 3-4 / 1 + 1 / 4-5 / 1 + 1 / 5-6 / 1 + +1 / 49-1 / 50
=1 / 2-1 / 50
=25-1 in 50
=24 out of 50
=12 out of 25