Question

Tính hop ly

21.49-11.49+90.49+49.125.16

\(\left(2^2+2^1+2^2+2^3\right).2^0.2^1.2^2.2^3\)

Answer 1

Tính hop ly

21.49-11.49+90.49+49.125.16

= 49.( 21 - 11 + 90 + 125 . 16 )

= 49 . ( 10 + 90 + 2000 )

= 49 . 2100

= 102900

(2²+2¹+2²+2³).2⁰.2¹.2².2³

= ( 4 + 2 + 4 + 8 ) . 1 . 2 . 4 . 8

= 18 . 64

= 1152

Study well 

Answer 2

\(21.49-11.49+90.49+49.125.16\)

\(=49.\left(21-11+90+125.16\right)\)

\(=49.\left(10+90+2000\right)=49.2100\)

\(=102900\)