Resposta :
a) 1530 = 1x1000 + 5x100+ 3x10 + 0x1
b) 2669 = 2x1000 + 6x100 + 6x10 + 9x1
c) 342 = 3x100 + 4x10 + 2x1
d) 12572 = 1x10000 + 2x1000 + 5x100 + 7x10 + 2x1
a) 1530 = 1x1000 + 5x100+ 3x10 + 0x1
b) 2669 = 2x1000 + 6x100 + 6x10 + 9x1
c) 342 = 3x100 + 4x10 + 2x1
d) 12572 = 1x10000 + 2x1000 + 5x100 + 7x10 + 2x1