7. 2⋅3⋅10-60 5⋅2⋅3+70 2⋅4⋅10-10 (17+43):10 90:(69-59) (84+16):10 1⋅(35+8) 0⋅(24-8) (29-28)⋅6

Решение:

1. 
   $$2 \cdot 3 \cdot 10 - 60 = 6 \cdot 10 - 60 = 60 - 60 = 0$$.
   


2. 
   $$5 \cdot 2 \cdot 3 + 70 = 10 \cdot 3 + 70 = 30 + 70 = 100$$.
   


3. 
   $$2 \cdot 4 \cdot 10 - 10 = 8 \cdot 10 - 10 = 80 - 10 = 70$$.
   


4. 
   $$(17 + 43) : 10 = 60 : 10 = 6$$.
   


5. 
   $$90 : (69 - 59) = 90 : 10 = 9$$.
   


6. 
   $$(84 + 16) : 10 = 100 : 10 = 10$$.
   


7. 
   $$1 \cdot (35 + 8) = 1 \cdot 43 = 43$$.
   


8. 
   $$0 \cdot (24 - 8) = 0 \cdot 16 = 0$$.
   


9. 
   $$(29 - 28) \cdot 6 = 1 \cdot 6 = 6$$.