8
添上括号,使下面的等式成立
$36 - 12÷3×2 = 4$
$36 - 12÷3×2 = 16$
$36 - 12÷3×2 = 34$
$36 - 12÷3×2 = 64$
$36÷12 - 3×2 = 6$
$36÷12 - 3×2 = 8$
$36÷12 - 3×2 = 0$
添上括号,使下面的等式成立
$36 - 12÷3×2 = 4$
$36 - 12÷3×2 = 16$
$36 - 12÷3×2 = 34$
$36 - 12÷3×2 = 64$
$36÷12 - 3×2 = 6$
$36÷12 - 3×2 = 8$
$36÷12 - 3×2 = 0$
答案
1. (36 - 12) ÷ (3 × 2) = 4
2. (36 - 12) ÷ 3 × 2 = 16
3. 36 - 12 ÷ (3 × 2) = 34
4. (36 - 12 ÷ 3) × 2 = 64
5. 36 ÷ (12 - 3 × 2) = 6
6. 36 ÷ (12 - 3) × 2 = 8
7. (36 ÷ 12 - 3) × 2 = 0
2. (36 - 12) ÷ 3 × 2 = 16
3. 36 - 12 ÷ (3 × 2) = 34
4. (36 - 12 ÷ 3) × 2 = 64
5. 36 ÷ (12 - 3 × 2) = 6
6. 36 ÷ (12 - 3) × 2 = 8
7. (36 ÷ 12 - 3) × 2 = 0
添上适当的运算符号或括号,使下面的等式成立
$1\quad2\quad3\quad4 = 0$
$1\quad2\quad3\quad4 = 1$
$1\quad2\quad3\quad4 = 2$
$1\quad2\quad3\quad4 = 3$
$1\quad2\quad3\quad4 = 4$
$1\quad2\quad3\quad4 = 5$
$4\quad4\quad4\quad4 = 9$
$4\quad4\quad4\quad4 = 8$
$1\quad2\quad3\quad4 = 0$
$1\quad2\quad3\quad4 = 1$
$1\quad2\quad3\quad4 = 2$
$1\quad2\quad3\quad4 = 3$
$1\quad2\quad3\quad4 = 4$
$1\quad2\quad3\quad4 = 5$
$4\quad4\quad4\quad4 = 9$
$4\quad4\quad4\quad4 = 8$
答案
1-2-3+4=0;1×2+3-4=1;1+2+3-4=2;1+2×3-4=3;1+2-3+4=4;(1+2)×3-4=5;4+4+4÷4=9;4×4-4-4=8
解析
1-2-3+4=0;
1×2+3-4=1;
1+2+3-4=2;
1+2×3-4=3;
1+2-3+4=4;
(1+2)×3-4=5;
4+4+4÷4=9;
4×4-4-4=8。
1×2+3-4=1;
1+2+3-4=2;
1+2×3-4=3;
1+2-3+4=4;
(1+2)×3-4=5;
4+4+4÷4=9;
4×4-4-4=8。
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