Question

22. Folosind proprietățile adunării, calculează rapid
1 + 2 + 3 + 4 + 5 +995 +996 + 997 + 998 + 999 =

4.100 + 3.800 + 2.400 + 2.600 + 1.200 + 900 =

16.700 + 24.500 + 50.000 + 25.500 + 33.300 =

83.100 + 112.000 + 15.000 + 38.000 + 66.900 =

199.999 + 235.000 + 300.000 + 65.000 + 200.001 =​

Answer 1

Răspuns:

1+2+3+4+5+995+996+997+998+999=

=1000+1000+1000+1000+1000=5000

4100+3800+2400+2600+1200+900=15000

16700+24500+50000+25500+33300=150000

83100+112000+15000+38000+66900=315000

199999+235000+300000+65000+200001=

=1000000

Answer 2

Răspuns:

Explicație pas cu pas:

primul=(999+1)+(998+2)+(997+3)+(996+4)+(995+5)=

1000+1000+1000+1000+1000+1000=5000

al doilea=(4100+900)+(3800+1200)+(2400+2600)=

5000+5000+5000=15000

al treilea=(16700+33300)+(24500+25500)+50000=

50000+50000+50000=150000

al patrulea=(83100+66900)+(112000+38000)+

15000=

150000+150000+15000=

300000+15000=

315000

al cincelea=(199999+200001)+(235000+65000)+300000=400000+300000+300000=1000000

Sper ca te-am ajutat!