267=200+60+7
389=300+80+9
405=400+0+5
540=500+40+0
368=300+60+8
709=700+0+9
999=900+90+9
115=100+10+5
12)
114+61=175 841-434=407
98+506=604 351-26=325
156+721=877 702-275=427
379+255=634 530-147=383
548+275-312=
=823-312
=511
865-422+369=
=443+369
=812
196+209+465=
=405+465
=870
932-345-108=
=587-108=
=479
