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빈 칸에 알맞은 수를 넣으세요.
1
3 × 2 × 11 + 15 - 5 = 6 ×11 +15 -5 = 66 +15 -5 = 81 -5 = 76 2
8 + 15 - 4 × 3 + 3 =+-+ =-+ =+ = 3
3 × 2 + 15 × 2 - 15 =+×- =+- =- = 4
15 × 2 + 10 - 3 × 10 =+-× =+- =- = 5
11 + 12 - 10 + 2 × 9 =+-+ =-+ =+ = 6
14 × 8 + 8 + 3 - 11 =++- =+- =- = 7
14 + 5 + 12 × 10 - 14 =++- =+- =- = 8
10 × 15 - 9 - 9 + 4 =--+ =-+ =+ = |