a)334+66=300+34+66
=300+(34+66)
=300+100
=400
b)127+273=100+27+273
=100+(27+273)
=100+300
=400
c)993+2107=900+93+2107
=900+(93+2107)
=900+2200
=3100
d)4675+1325=4000+675+1325
=4000+(675+1325)
=4000+2000
=6000
e)35275+24725=30000+5275+24725
=30000+(5275+24725)
=30000+30000
=60000
