Question

Calculează în scris:24×35= ,38×49,56×93,126×15,320×24,251×34,140×60,302×28
apoi verifica dupa modelul :235×23=235(20+3)
=235×20+235×3
=4700+705
=5405​

Answer 1

Răspuns:

Explicație pas cu pas:

24×35=24(30+5)

=24×30+24×5

=720+120

=840

39x49= 39(40+9)

= 39x40+ 39x9

=1560+351

= 1911

,56×93=56(90+3)

=56×90+56×3

=5040+168

=5208

 126×15=126(10+5)

= 126×10+ 126×5

=1260+630

=  1890    

,320×24=320(20+4)

=320×20+320×4

=6400+1280

=7680      

251×34=251(30+4)

=251×30+251×4

=7530+1004

= 8534  

,140×60=140(60+0)

=140×60+140×0

=8400+0

=  8400

,302×28=302(20+8)

=302×20+302×8

=6040+2416

=8456