Question

вычислите: 1 7/15 - 4/25, 6 3/4 * 1 7/9, 3 1/5 : 2 2/5, (48: 45 - 1/3) * 2 3/11 + 3/5

Answer 1

1 7/15 - 4/25=1 35/75 - 12/75=1 23/75

6 3/4 * 1 7/9=27/4 * 16/9=3*4=12

3 1/5 : 2 2/5=16/5 : 12/5=16/5 * 5/12=4/3=1 1/3

(48:45 - 1/3)*2 3/11+3/5=2 4/15

1) 48:45=48/45=1 3/45=1 1/15

2) 1 1/15 - 1/3=1 1/15 - 5/15=16/15 - 5/15=11/15

3) 11/15 * 2 3/11=11/15 * 25/11=5/3=1 2/3

4) 1 2/3+3/5=1 10/15 + 9/15=1 19/15=2 4/15