1000 và 100 và...A.10000 B.200 C.1212

100 + ........= 1000

200 + ........ = 1000

300 + ..........= 1000

400 + ............= 1000

500 + ..........= 1000

600 + ............= 1000

700 + ..............=1000

800 + ..............= 1000

900 + ..............= 1000

1000 + ..........= 1000

500 – 300 = 200	600 − 300 = ...	700 − 200 = ....
500 − 400 = ...	700 − 300 = ...	800 − 300 = ....

1000 – 200 = 800	1000 − 300 = ...	1000 − 400 = ...
1000 − 500 = ...	1000 − 600 = ...	1000 − 800 = ...