1) 1/15:(-2/3)-1,6 2) (1 11/16- 3 7/8)*4

Question

1) 1/15:(-2/3)-1,6
2) (1 11/16- 3 7/8)*4

Answer 1

1) 1 / 15 / ( – 2 / 3) – 1,6 =  – 1,7
2) (1 11/16- 3 7/8)*4 = 9.25000000000000

Answer 2

1. 1/15÷(-2)/3=(1*3)/(15*(-2))=-1/10
2. -1/10-16/10=(-1-16)/10=-17/10=-1.7

Comments

2)

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1. 111/16-37/8=(111-74)/16=37/16; 2. 37/16/4=37/4=9,25; 3. 9,25-9,25=0