

Ripasso delle proprietà
Presentation
•
Mathematics
•
4th Grade
•
Hard
Nicoletta Romagnoli
FREE Resource
5 Slides • 0 Questions
1
Ripasso delle proprietà

2
Addizione
proprietà commutativa 15+30+4=4+30+15=49
proprietà associativa 15+30+4= 19+30=49
proprietà dissociativa 54+146= 50+4+100+40+6=50+150=200
3
Moltiplicazione
proprietà commutativa 24x12= 12x24=288
proprietà associativa 24x6x2=48x6=288
proprietà distributiva rispetto alla somma 15x18= 15x(10+8)= (15x10)+(15x8)=150+120=270
proprietà distributiva rispetto alla differenza 15x18=15x(20-2)= (15x20)-(15x2)=300-30=270
proprietà dissociativa 15x18= 15x9x2= (15x2)x9=30x9=270
4
Sottrazione
proprietà invariantiva 43-25= (43+5)-(25+5)=48-30=18
43-25=( 43-5)-(25-5)=38-20=18
5
Divisione
proprietà invariantiva 75:15= (75:5):(15:5)=15:3=5
proprietà distributiva rispetto alla somma 75:15= (60+15):15= (60:15)+(15:15)=4+1=5
proprietà invariantiva rispetto alla differenza 75:15= (90-15):15=(90:15)-(
Ripasso delle proprietà

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