Question

Oblicz sprytnie:

zad.6 strona 27 matematyka z plusem

43*5=

8*41=

45*16=

5*123=

54*9=

35*90=

65*11=

11*270=

Answer 1

43*5=215

8*41=328

45*16=720

5*123=615

54*9=486

35*90=3150

65*11=715

11*270=2970

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=670

5*123=5*100+5*20+5*3=500+100+15=615

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

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

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

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

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