Question

find the sum by suitable rearrangement
a)-837+208+363
b)-1962+453+1583+647

Answer 1

Answer:

(a) 837+208+363

=(837+363)+208

=1200+208

=1408

(b) 1962+453+1538+647

= (1962+1538) + (453+647)

= 4600

Answer 2

Answer:

a)-837+208+363

=-837+(208+363)

= -837+571

= -266

2)-1962+453+2583+647

= --1962+(453+647)+2583

=-1962+1100+2583

= -1962+3683

=1721