Question

Распишите всё подробно пожайлуста!

1)3 3/7 + 1 3/14 * (8 3/5 - 1 3/5) =?

2) 2 5/9 * 2 1/4 - 6 2/9 * 3/8=?

3) (6 2/5 * 2 11/12 - 16) * 2 1/4=?

Answer 1

1) 3 3/7 + 1 3/14 • (8 3/5 - 1 3/5) =
= 24/7 + 17/14 • (43/5 - 8/5) =
= 24/7 + 17/14 • 7 =
= 24/7 + 119/14 =
= 48/14 + 119/14 = 167/14 =11 13/14

2)2 5/9 • 2 1/4 - 6 2/9 • 3/8 =
= 23/9 • 9/4 - 56/9 • 3/8 =
= 207/36 - 168/72 =
= 414/72 - 168/72 =
= 246/72 = 41/12 = 3 5/12

3) (6 2/5 • 2 11/12 -16) •2 1/4 =
= (32/5 • 35/12 - 16) • 9/4 =
= (56/3 - 48/3) • 9/4 =
= 8/3 • 9/4 = 12