Create better lessons quicker
0+?=20 - 20, 1+?=20 - 19, 2+?=20 - 18, 3+?=20 - 17, 4+?=20 - 16, 5+?=20 - 15, 6+?=20 - 14, 7+?=20 - 13, 8+?=20 - 12, 9+?=20 - 11, 10+?=20 - 10, 11+?=20 - 9, 12+?=20 - 8, 13+?=20 - 7, 14+?=20 - 6, 15+?=20 - 5, 16+?=20 - 4, 17+?=20 - 3, 18+?=20 - 2, 19+?=20 - 1, 20+?=20 - 0,

number bonds to 20

by Natalie

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