Question

Помогите пожалуйста!! Даю 10 балов!!,

Answer 1

1. 81/88×(6-1 13/15 × 1 19/21)= 81/88 (6-247/315)= 81/88 × 1643/315= 9/88 × 1643/35= 14787/3080=4 2467/3080=4,8
2. (5,625×1 1/3-3 11/18 -5/9)÷1 2/3=(45/8 ×1/3 -11/6×9/5)×2/3=(15/8-1/3-11/6×9/5)×2/3=(15/8- 33/10)×2/3=(-57/40)×2/3=-19/20=-0.95
3. 32-41+54-73=-28
5. |4-5×1,7|-3|1,7|=|4-8,5|-3×1,7=|-4,5|-5,1=4,5-5,1=-0,6