Question

Oblicz sprytnie ;

43razy 5=

8 razy 41 =

45razy 16=

5 razy 123 =

54 razy 9=

35 razy 90=

65 razy 11=

11 razy 270=

Answer 1

43*5=40*5+3*5=200+15=215

8*41=8*40+8*1=320+8=328

45*16=40*16+5*16=640+80=720

5*123=5*120+5*3=600+15=615

54*9=50*9+4*9=450+36=486

35*90=30*90+5*90=2700+450=3150

65*11=60*11+5*11=660+55=715

11*270=10*270+1*270=2700+270=2970

 

Mam nadzieję,że pomogłm ;]]

Answer 2

43 *5 = 40*5 + 3*5= 200 + 15 = 215

8 *41 = 8* 40 + 8 *1 = 320 + 8 = 328

45 *16 = 45*10 + 45*6 = 450 + 270 = 720

5 * 123 = 5 *100 + 5*23 = 500 + 115 = 615

54 *9 = 54*10 - 54 *1 = 540 - 54 = 486

35 * 90 = 30 *90 + 5 *90 = 2700 +450= 3150

lub  35*90= 35*100 - 35*10 = 3500 - 350 = 3150

65 *11 = 65 *10 + 65*1 = 650 + 65 = 715

11 * 270 = 10 *270 + 1*270= 2700 +270= 2970