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descompuneti numerele 54, 21, 55, 119, 143, 1850, 21300 va rog urgent!!!

Răspuns :

54(5×10+4) 21(2×10+1) 119(10×10+10+9) 143(10×10+4×10+3) 1850(100×10+100×8+10×5) 21300(2 ×10000+100×10+3×100) CU PLACERE
54=50+4=5x10+1x4
21=20+1=2x10+1x1
55=50+5=5x10+1x5
119=100+10+9=1x100+1x10+1x9
143=100+40+3=1x100+4x10+1x3
1850=1000+800+50=1x1000+8x100+5x10
21300=20000+1000+300=2x10000+1x1000+3x100