<p>1</p><p>Complements to 20</p><p>Add up these numbers using the complements to 20</p><p>1, 3 7 5 5</p><p>2, 6 7 4 3</p><p>3, 5 9 1 5</p><p>4, 2 6 8 4</p><p>5, 1 7 9 3</p><p>6, 12 5 8 5</p><p>7, 9 1 9 11</p><p>8, 15 5 8 2</p><p>9, 8 7 12 3</p><p>10, 13 7 9 1 2</p><p>Complements to 20</p><p>Add up these numbers using the complements to 20</p><p>1, 7 8 2 3</p><p>2, 12 1 9 8</p><p>3, 3 6 17 4</p><p>4, 5 6 4 15</p><p>5, 11 13 7 9</p><p>6, 16 1 19 2 4 8</p><p>7, 1 19 18 7 3 2</p><p>8, 11 9 9 2 1 18</p><p>9, 18 1 1 17 2 1</p><p>10, 15 5 5 3 2 1 3</p><p>Complements to 100</p><p>Add up these numbers using the complements to 10, 20 and 100</p><p>1, 70 30 80 20</p><p>2, 60 40 10 90 7 3</p><p>3, 18 2 70 10 5 5</p><p>4, 70 15 15 90 10 6 4</p><p>5, 50 18 25 25 2 9 1</p><p>6, 75 10 8 2 3 2</p><p>7, 20 1 14 6 80 9</p><p>8, 50 2 40 8 6 3 1</p><p>9, 40 35 35 2 30 60 8</p><p>10, 6 7 10 70 3 4 65 30 5 4</p><p>Complements to 1000</p><p>Add up these numbers using the complements to 1000</p><p>1, 700 300 50 950 10 80 10</p><p>2, 250 600 40 150 40 20</p><p>3, 620 50 200 30 100</p><p>4, 190 60 400 50 380 120</p><p>5, 310 25 75 70 500 15 5</p><p>6, 550 70 300 100 80</p><p>7, 10 80 15 75 20 700 75 25</p><p>8, 90 80 250 50 700 30</p><p>9, 450 300 80 20 50 100</p><p>10, 730 120 120 40 80 10</p>