N.1 Multiply teen numbers using distributive property
Multiply:
6 × 19 = (6 × 10) + (6 × ) 6 × 19 = 60 + 6 × 19 =
9 × 11 = (9 × 10) + (9 × ) 9 × 11 = 90 + 9 × 11 =
3 × 16 = (3 × 10) + (3 × ) 3 × 16 = 30 + 3 × 16 =
7 × 14 = (7 × 10) + (7 × ) 7 × 14 = 70 + 7 × 14 =
6 × 11 = (6 × ) + (6 × 1) 6 × 11 = + 6 6 × 11 =
2 × 16 = (2 × ) + (2 × 6) 2 × 16 = + 12 2 × 16 =
5 × 18 = (5 × 10) + (5 × ) 5 × 18 = 50 + 5 × 18 =
8 × 12 = (8 × 10) + (8 × ) 8 × 12 = 80 + 8 × 12 =
4 × 19 = (4 × ) + (4 × 9) 4 × 19 = + 36 4 × 19 =
7 × 16 = (7 × 10) + (7 × ) 7 × 16 = 70 + 7 × 16 =
8 × 14 = (8 × ) + (8 × 4) 8 × 14 = + 32 8 × 14 =
9 × 13 = (9 × ) + (9 × 3) 9 × 13 = + 27 9 × 13 =
2 × 17 = (2 × 10) + (2 × ) 2 × 17 = 20 + 2 × 17 =
3 × 15 = (3 × ) + (3 × 5) 3 × 15 = + 15 3 × 15 =
4 × 15 = (4 × 10) + (4 × ) 4 × 15 = 40 + 4 × 15 =
6 × 13 = (6 × 10) + (6 × ) 6 × 13 = 60 + 6 × 13 =
7 × 12 = (7 × ) + (7 × 2) 7 × 12 = + 14 7 × 12 =
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