Question

calculati asociind termenii in mod convenabil
65+84+35+44+56+16=
418+315+99+455+82+501=

dau coroana

Answer 1

65+84+35+44+56+16=
=(65+35)+(84+16)+(44+56)
=100+100+100
=300

418+315+99+455+82+501= 
=(418+82)+(99+501)+(315+455)
=500+600+770
=1100+770
=1870