Question

Ex 4. va rog dau coroana!

Answer 1

Răspuns:

A) 28+59+12= 28+12+59=(28+12)+59=40+59=99

B) 425+78+75= 425+75+78=(425+75)+78=500+78=578

C) 3243+749+757+301=3243+757+749+301=(3243+757)+ (749+301)=4000+1050=5050

D) 1599+3724+401+276=1599+401+3724+276=(1599+401)+ (3724+276)=2000+4000=6000

Answer 2

Explicație pas cu pas:

4. a) 28+59+12=28+12+59=(28+12)+59=40+59=99

b) 425+78+75=425+75+78=(425+75)+78=500+78=578

c) 3243+749+757+301=3243+757+749+301=(3243+575)+(749+30+)=4000+1050=5050

d) 1599+3724+401+276=1599+401+3724+276=(1599+401)+(3724+276)=2000+4000=6000