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빈 칸에 알맞은 수를 넣으세요.
1
10 + 9 × 4 - 13 - 2 = 10 +36 -13 -2 = 46 -13 -2 = 33 -2 = 31 2
15 × 13 - 2 + 3 × 13 =-+× =-+ =+ = 3
13 × 11 - 12 + 12 - 6 =-+- =+- =- = 4
5 × 11 × 3 - 14 + 5 =×-+ =-+ =+ = 5
3 × 7 - 6 - 14 + 13 =--+ =-+ =+ = 6
8 × 5 + 12 + 5 - 3 =++- =+- =- = 7
4 + 2 × 5 × 8 - 2 =+×- =+- =- = 8
8 + 8 × 3 + 12 - 11 =++- =+- =- = |