Question

tính nhanh

5 + 10 x 2 + 8 x 10

Answer 1

5 + 10 x 2 + 8 x 10

= 5 + (2 + 8) x 10\

= 5  +    10   x 10

=     105

Answer 2

\(5+10\times2+8\times10\)

\(=10\times\left(2+8\right)+5\)

\(=10\times10+5\)

\(=105\)

Answer 3

 5+10.2+8.10

=10.(2+8)+5

=(10.10)+5

=100+5

=105