a)=(513+487)+666=1000+666
=1666
b)=9999(6314+3686)=9999+10000
=19999
c)=(32684+316)+(41325+675)=33000+42000
=76000
d)(58216+1784)+(427+573)=60000+1000
=61000
a) =(513+487)+666
=1000+666
=1666
b)=9999+(6314+3686)
=9999+10000
19999
c)=(32684+316)+(41325+675)
=33000+42000
=75000
d)(58216+1784)+(427+573)
=60000+1000
=61000
hi hi nhớ nhé!