Question

tính nhanh :

50 x 10 + 50 x 10

10 x 20 + 80 x 10

Answer 1

50 x 10 + 50 x 10

= (50 + 50) x 10

=     100 x 10

=        1000

10 x 20 + 80 x 10

= (20 + 80) x 10

=     100 x 10

=         1000

Answer 2

\(50.10+50.10\)

\(=500+500\)

\(=1000\)

\(10.20+80.10\)

\(=10.\left(20+80\right)\)

\(=10.100\)

\(=1000\)

Answer 3

50 x 10 + 50 x 10

= 500 + 500

= 1000

10 x 20 + 80 x 10

= 10 x ( 20 + 80 )

=10 x 100

= 1000

Answer 4

tính nhanh :

50 x 10 + 50 x 10

10 x 20 + 80 x 10

50.10+50.10

=500+500

=1000

10.20+80.10

=10.(20+80)

=10.100

=1000

Answer 5

1000

1000