Jump to exercise:
Fill the gap.
559, , 579, 589, 599
, 869, 879, 889, 899
359, 369, 379, , 399
159, 169, , 189, 199
959, 969, , 989, 999
, 656, 666, 676, 686
59, , 79, 89, 99
759, 769, 779, , 799
213, 223, 233, , 253
359, 369, , 389, 399
, 669, 679, 689, 699
, 423, 433, 443, 453
224, 234, 244, , 264
118, , 138, 148, 158
438, 448, , 468, 478
948, 958, 968, , 988
13, 23, 33, , 53
Your score is:
Excellent
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