105 x 15
= ( 100 + 5) X 15
= 100 x 15 + 5 x 15
= 1500 + 75
= 1575
105x15
=﹙100+5﹚×15
=1500+75
=1575
105×15
=(100+5)×15
=100×15+5×15
=1500+75
=1575
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