Question

Answer 1

a: \(=27\left(39+63-2\right)=2700\)

b:\(=66\left(25+5+14+33\right)=6600\)

c: \(=35\left(23+41\right)+64\cdot65=6400\)

Answer 2

A, 27.39 + 27.63 - 2.27 

= 27.(39 + 63 - 2)

= 27. 100

= 2700

B, 66.25 + 5.66 + 66.14 + 33.66 

= 66.(25 + 5 + 14 + 33)

= 66. 77

= 5082

C, 35.23 + 35.41 + 64.65

= 35.(23 + 41) + 64.65

= 35. 64 + 64.65

= 64.(35 + 65)

= 64.100

= 6400