Question

calculează 71-9×3+16÷4: (15-6×2)+8×6: 36+8×3-6×7: 72÷8+(24-3×7): b×4×2=64

Answer 1

 71 - 9 × 3 + 16 : 4 = 48 
= 71 - 27 + 4 =
= 44 + 4 =
= 48 


 ( 15 - 6 × 2 ) + 8 × 6 = 51 
= ( 15 - 12 ) + 48 =
= 3 + 48 =
= 51 


 36 + 8 × 3 - 6 × 7= 18 
= 36 + 24 - 42 =
= 60 - 42 =
= 18 


 72 : 8 + ( 24 - 3 × 7 ) = 12 
= 9 + ( 24 - 21 ) =
= 9 + 3 =
= 12 


 b × 4 × 2 = 64
b × 8 = 64 
b = 64 : 8 
b = 8