Question

Va rog ajutatima la acest exercițiu ba dau 8
puncte​

Answer 1

Explicație pas cu pas:

30*60=(3*10)*(6*10)=(3*6)*(10*10)=18*100=1800

60*40=(6*10)+(4*10)=(6*4)*(10*10)=24*100=2400

12*400=12*(4*100)=(12*4)*100=48*100=4800

700*110=(7*100)*(11*10)=(7*11)*(100*10)=77*1000=77000

3000*15=(3*1000)*15=(3*15)*1000=45*1000=45000

300*15000=(3*100)*(15*1000)=(3*15)*(100*1000)=45*100000=4500000

Answer 2

Explicație pas cu pas:

30 x 60 = (3 x 10) x (6 x 10)

= 3 x (10 x 6) x 10

= 3 x 60 x 10

= 180 x 10

= 1800

60 x 40 = ( 6 x 10) x (4 x 10)

= 6 x (10 x 4) x 10

= 6 x 40 x 10

= 240 x 10

= 2400

12 x 400 = 12 x (100 x 4)

= (12 x 100) x 4

= 1200 x 4

= 4 800

700 x 110 = (7 x 100) x (10 x 11)

= 7 x (100 x 10) x 11

= 7 x 1000 x 11

= 7000 x 11

= 77000

3000 x 15 = (3 x 1000) x (5 x 3)

= 3 x (1000 x 5) x 3

= 3 x 5000 x 3

= 15000 x 3

= 45 000

300 x 15 000 = (3 x 100) x (1000 x 15)

= 3 x (100 x 1000) x 15

= 3 x 100 000 x 15

= 300 000 x 15

= 4 500 000