以下是100道四则混合运算练习题（附答案），涵盖整数加减乘除、带括号及脱式计算等多种题型，适合四年级至五年级学生练习使用。
一、基础口算热身（20道）
| 题号 | 题目 | 答案 |
|---|---|---|
| 1 | 25 + 36 = | 61 |
| 2 | 78 - 49 = | 29 |
| 3 | 18 × 5 = | 90 |
| 4 | 81 ÷ 9 = | 9 |
| 5 | 60 + 70 = | 130 |
| 6 | 100 - 37 = | 63 |
| 7 | 12 × 4 = | 48 |
| 8 | 56 ÷ 7 = | 8 |
| 9 | 33 + 57 = | 90 |
| 10 | 92 - 56 = | 36 |
| 11 | 7 × 9 = | 63 |
| 12 | 63 ÷ 3 = | 21 |
| 13 | 48 + 29 = | 77 |
| 14 | 80 - 24 = | 56 |
| 15 | 15 × 3 = | 45 |
| 16 | 40 ÷ 5 = | 8 |
| 17 | 66 + 28 = | 94 |
| 18 | 73 - 35 = | 38 |
| 19 | 22 × 4 = | 88 |
| 20 | 90 ÷ 6 = | 15 |
二、不含括号的两步混合运算（40道）
| 题号 | 题目 | 答案 |
|---|---|---|
| 21 | 35 + 15 × 2 | 65 |
| 22 | 70 - 20 ÷ 4 | 65 |
| 23 | 18 × 3 + 25 | 79 |
| 24 | 96 ÷ 6 - 8 | 8 |
| 25 | 42 + 56 ÷ 7 | 50 |
| 26 | 80 - 12 × 5 | 20 |
| 27 | 9 × 7 - 30 | 33 |
| 28 | 63 ÷ 9 + 28 | 35 |
| 29 | 26 + 34 × 2 | 94 |
| 30 | 100 - 75 ÷ 5 | 85 |
| 31 | 8 × 6 + 45 | 93 |
| 32 | 72 ÷ 8 + 36 | 45 |
| 33 | 50 - 6 × 7 | 8 |
| 34 | 48 + 32 ÷ 4 | 56 |
| 35 | 15 × 4 - 28 | 32 |
| 36 | 99 - 81 ÷ 9 | 90 |
| 37 | 23 + 7 × 9 | 86 |
| 38 | 64 ÷ 4 - 12 | 4 |
| 39 | 8 × 8 - 40 | 24 |
| 40 | 55 + 45 ÷ 3 | 70 |
| 41 | 60 - 18 × 3 | 6 |
| 42 | 27 ÷ 3 + 65 | 74 |
| 43 | 12 × 5 + 38 | 98 |
| 44 | 100 - 44 ÷ 4 | 89 |
| 45 | 7 × 7 + 29 | 78 |
| 46 | 81 ÷ 9 - 5 | 4 |
| 47 | 38 + 26 × 2 | 90 |
| 48 | 90 - 60 ÷ 3 | 70 |
| 49 | 14 × 4 - 30 | 26 |
| 50 | 72 ÷ 6 + 49 | 61 |
| 51 | 5 × 9 + 55 | 100 |
| 52 | 88 - 16 × 4 | 24 |
| 53 | 36 ÷ 4 + 70 | 79 |
| 54 | 9 × 6 - 27 | 27 |
| 55 | 40 + 63 ÷ 7 | 49 |
| 56 | 100 - 3 × 12 | 64 |
| 57 | 11 × 7 + 13 | 90 |
| 58 | 60 ÷ 5 - 8 | 4 |
| 59 | 29 + 8 × 8 | 93 |
| 60 | 95 - 72 ÷ 8 | 86 |
三、含有小括号的两步混合运算（20道）
| 题号 | 题目 | 答案 |
|---|---|---|
| 61 | (25 + 15) × 2 | 80 |
| 62 | 70 - (20 ÷ 4) | 65 |
| 63 | 18 × (3 + 2) | 90 |
| 64 | (96 - 24) ÷ 6 | 12 |
| 65 | 42 + (56 - 28) | 70 |
| 66 | (80 - 12) × 5 | 340 |
| 67 | 9 × (7 - 3) | 36 |
| 68 | (63 + 27) ÷ 9 | 10 |
| 69 | 100 ÷ (5 + 5) | 10 |
| 70 | (35 + 45) ÷ 8 | 10 |
| 71 | 72 ÷ (8 + 1) | 8 |
| 72 | (50 - 20) × 3 | 90 |
| 73 | 84 ÷ (7 + 5) | 7 |
| 74 | (18 + 22) × 4 | 160 |
| 75 | 56 - (8 × 4) | 24 |
| 76 | (45 + 15) ÷ 6 | 10 |
| 77 | 9 × (12 - 5) | 63 |
| 78 | (80 - 35) ÷ 5 | 9 |
| 79 | 64 ÷ (16 ÷ 2) | 8 |
| 80 | (27 + 33) ÷ 6 | 10 |
四、脱式计算——较复杂的混合运算（20道）
| 题号 | 题目 | 答案 |
|---|---|---|
| 81 | 26 + 39 - 24 | 41 |
| 82 | 14 + 5 × (8 - 4) | 34 |
| 83 | 6 × (5 + 4) - 3 | 51 |
| 84 | 72 - (8 - 2) + 10 | 76 |
| 85 | 9 × 7 - 36 ÷ 6 | 57 |
| 86 | (13 + 17) × 3 | 90 |
| 87 | 85 - 35 + 42 ÷ 6 | 57 |
| 88 | 4 × (19 - 11) + 36 ÷ 9 | 36 |
| 89 | 84 - (7 + 5) × 5 - 20 | 4 |
| 90 | 37 + 23 - 18 | 42 |
| 91 | 48 - 6 × 4 | 24 |
| 92 | 15 + 3 × (7 - 2) | 30 |
| 93 | 8 × (4 + 3) - 7 | 49 |
| 94 | (14 + 16) ÷ (7 - 2) | 6 |
| 95 | 88 - 38 + 36 ÷ 4 | 59 |
| 96 | 5 × (17 - 9) + 56 ÷ 8 | 47 |
| 97 | 78 - (6 + 7) × 4 - 15 | 23 |
| 98 | 18 + 42 - 23 | 37 |
| 99 | 28 - 4 × 7 | 0 |
| 100 | 20 + 5 × (8 - 3) | 45 |
有括号：先算括号里面的；
无括号：先算乘除法，后算加减法；
同级运算（只有加减或只有乘除）：从左往右依次计算。