Question

Calculeaza, aplicand proprietatile adunării:
MODEL: 1 235 + 68 +2 255 = (1 235 - 68) - 2 255
= 1 303 +2 255 a) 125 + 1235 * 434 =
=3558
b) 235 - 1 345-2350 =
sau
c) 6099 75 +1020 =
1235 + 68 +2 255 = 1235 + (68 + 2 255)
=1235 +2 323
d) 4 012 320 + 1999 =
= 3 558
e) 2 358 +1 234 + 4 398 =

Answer 1

Răspuns:

a) 125 + 1235 +434 = ( 125 +1235) + 434

= 1360 + 434

= 1794

125 + 1235 + 434 = 125 + ( 1235 + 434 )

= 125 + 1669

= 1794

b) 235 + 1345 + 2350 =(235 + 1345)+2350

= 1580 + 2350

= 3930

235 + 1345 + 2350 = 235 + ( 1345 + 2350 )

= 235 + 3695

= 3930

c) 6099 + 75 + 1020 = ( 6099 + 75 ) + 1020

= 6174 + 1020

= 7194

6099 + 75 + 1020 = 6099 + ( 75 + 1020 )

= 6099 + 1095

= 7194

d) 4012 + 320 + 1999 = (4012 + 320)+ 1999

= 4332 + 1999

= 6331

4012 + 320 + 1999 = 4012 + ( 320 + 1999)

= 4012 + 2319

= 6331

e) 2358+1234+4398 =(2358 + 1234)+4398

= 3592 + 4398

= 7990

2358+1234+4398 = 2358 + ( 1234 + 4398 )

= 2358 + 5632

= 7990