1) 7 = __ - 7 a) 0 b) 14 c) 11 2) 10 = ___ - 2 a) 12 b) 9 c) 8 3) 3 = __ - 8 a) 1 b) 5 c) 11 4) 6 = __ - 4 a) 10 b) 9 c) 7 5) 5 = 13 - __ a) 4 b) 6 c) 8 6) 9 = 19 - __ a) 10 b) 14 c) 22 7) 11 = 18 - __ a) 6 b) 7 c) 4 8) 12 = 20 - __ a) 8 b) 11 c) 12 9) Andrea has 12 lollipops. She gave some to Nathaly. Now Andrea has 8 lollipops left. How many lollipops did Andrea give to Nathaly? a) 12 b) 20 c) 4 d) 3 10) Joseph has 15 colored pencils. He gave some to Amiya. Now Joseph has 9 colored pencil left. How many colored pencils did Joseph give to Amiya? a) 6 b) 24 c) 5 d) 19

Finding the Unknown Number

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