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빈 칸에 알맞은 수를 넣으세요.
1
(55 ÷ 11) × 4 + 11 - 9 = 5 ×4 +11 -9 = 20 +11 -9 = 31 -9 = 22 2
(10 × 12) - 18 ÷ 6 + 12 =-÷+ =-+ =+ = 3
21 ÷ 3 + (6 × 10) - 11 =÷+- =+- =- = 4
(11 × 99) ÷ 11 - 2 + 5 =÷-+ =-+ =+ = 5
3 × (36 ÷ 6) - 10 + 8 =×-+ =-+ =+ = 6
9 ÷ 3 × (10 - 5) + 5 =÷×+ =×+ =+ = 7
9 + 12 × 30 ÷ (10 - 8) =+×÷ =+÷ =+ = 8
(77 ÷ 11) + 4 - 5 × 2 =+-× =+- =- = |