MATH CAT Mixed Operations
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MATH CAT 進階卷 · Hard

小三四則運算練習 P3 Mixed Operations Practice

小三 P3 · 難度 Level 4–5 · 15 題 questions

香港教育局課程 · Hong Kong EDB curriculum — 學習範疇 Strand: 數 Number · 學習單元 Learning Unit: 3N4

姓名 Name: ______________________ 日期 Date: ______________ 分數 Score: ______ / 15

請圈出最佳答案。 · Circle the best answer.

1.

要令算式 35 + 5 × 4 + 18 = 145 成立，應在甚麼位置加上括號？

To make 35 + 5 × 4 + 18 = 145 true, where should brackets be added?

  1. A. (35 + 5) × 4 + 18
  2. B. 35 + (5 × 4 + 18)
  3. C. 35 + 5 × (4 + 18)
  4. D. (35 + 5 × 4) + 18

2.

計算：900 − (178 − 14 × 5) = ___。

Calculate: 900 − (178 − 14 × 5) = ___.

  1. A. 852
  2. B. 851
  3. C. 853
  4. D. 854

3.

把 8 × 14 × 6 寫成 8 × (___ × ___) = 8 × ___ = ___。

Rewrite 8 × 14 × 6 as 8 × (___ × ___) = 8 × ___ = ___.

  1. A. 14+6+84+672
  2. B. 13
  3. C. 15
  4. D. 16

4.

書架上有 253 本漫畫，漫畫比小說少 47 本。書架上有多少本小說？

There are 253 comics on a shelf. Comics are 47 fewer than novels. How many novels are there?

  1. A. 206
  2. B. 253
  3. C. 290
  4. D. 300

5.

禮堂有 408 張椅子，平均分成 4 行。每行有 _____ 張椅子。

There are 408 chairs in the hall. They are divided evenly into 4 rows. There are _____ chairs in each row.

  1. A. 99
  2. B. 100
  3. C. 101
  4. D. 102

6.

根據分配律：6 × 25 − 6 × 7 = 6 × (25 − ___) = 6 × ___ = ___。請依次填空。

Using the distributive law: 6 × 25 − 6 × 7 = 6 × (25 − ___) = 6 × ___ = ___. Fill in the blanks in order.

  1. A. 6
  2. B. 7+18+108
  3. C. 8
  4. D. 9

7.

180 + (92 − 12 × 5) = ?

  1. A. 192
  2. B. 200
  3. C. 212
  4. D. 232

8.

把 2 × 18 + 2 × 7 寫成一個算式：2 × (___ + ___) = 2 × ___ = ___。

Write 2 × 18 + 2 × 7 as one expression: 2 × (___ + ___) = 2 × ___ = ___.

  1. A. 17
  2. B. 18+7+25+50
  3. C. 19
  4. D. 20

9.

根據分配律：(29 + 1) × (1 + 2) = 30 × 3 = ___。

Using the distributive law: (29 + 1) × (1 + 2) = 30 × 3 = ___.

  1. A. 90
  2. B. 89
  3. C. 91
  4. D. 92

10.

計算：(7 + 15) × 6 = ___。

Calculate: (7 + 15) × 6 = ___.

  1. A. 131
  2. B. 132
  3. C. 133
  4. D. 134

11.

美雯有 700 元，她購買一件校服和一件外套後，還餘下多少元？校服 248 元，外套 295 元。

Meiwen has $700. She buys a school uniform for $248 and a jacket for $295. How much does she have left?

  1. A. 147$147
  2. B. 152$152
  3. C. 157$157
  4. D. 167$167

12.

以下哪條算式最適合估算 324 × 7 − 28 的計算結果？

Which expression best estimates 324 × 7 − 28?

  1. A. 300 × 7 − 20
  2. B. 300 × 7 − 30
  3. C. 400 × 7 − 20
  4. D. 400 × 7 − 30

13.

以下哪一條算式正確運用了分配律？

Which expression correctly uses the distributive law?

  1. A. 6 × (3 + 2) = 6 × 3 + 6 × 2
  2. B. 4 × (8 + 5) = 4 × 8 + 5
  3. C. 5 × (7 − 1) = 5 × 7 + 1
  4. D. 3 × (4 + 4) = 3 × 4

14.

(83 − 37 × 2) × 9 = ?

  1. A. 72
  2. B. 63
  3. C. 90
  4. D. 81

15.

一盒貼紙有 58 張，可晴擁有的貼紙比造庭有的多 17 張，是造庭的 2 倍。造庭有貼紙多少張？

A box has 58 stickers. Coco has 17 more stickers than Zoting, and her stickers are twice as many as Zoting’s. How many stickers does Zoting have?

  1. A. 17 張17
  2. B. 20 張20
  3. C. 21 張21
  4. D. 25 張25
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MATH CAT 答案 · Answer Key

小三四則運算 · 進階卷 P3 Mixed Operations · Hard

1. C 35 + 5 × (4 + 18)

喵！先做乘法，再做加減～或者用括號先算加減再乘！Meow! Do multiplication first, then add/subtract. Or use brackets to add first!

2. A 852

喵！5 份，每份 14 個，就是 14 加 14 加……共 5 次！Meow! 5 groups of 14 — that's 14+14+... 5 times!

3. A 14+6+84+672

喵！8 份，每份 14 個，就是 14 加 14 加……共 8 次！Meow! 8 groups of 14 — that's 14+14+... 8 times!

4. D 300

喵～漫畫比小說少，所以小說更多！要把 47 加回去才對喔～🐟Meow~ Comics are fewer than novels, so novels are more! You need to add 47 back~ 🐟

5. D 102

喵！408 張椅子，「平均」分 4 行～用除法！Meow! 408 chairs "evenly" into 4 rows — use division!

6. B 7+18+108

喵！6 份，每份 25 個，就是 25 加 25 加……共 6 次！Meow! 6 groups of 25 — that's 25+25+... 6 times!

7. C 212

喵～括號裏面要先算！括號裏面也要先乘後減喔～🐾Meow~ Calculate inside the brackets first! And inside, multiply before subtract~ 🐾

8. B 18+7+25+50

喵！2 × 18 就是數 2 共 18 次！2、4、6、8……繼續數下去！Meow! 2 × 18 means count 2, 18 times! That's 2, 4, 6, 8... keep counting!

9. A 90

喵！3 份，每份 30 個，就是 30 加 30 加……共 3 次！Meow! 3 groups of 30 — that's 30+30+... 3 times!

10. B 132

喵！先做乘法，再做加減～或者用括號先算加減再乘！Meow! Do multiplication first, then add/subtract. Or use brackets to add first!

11. C 157

喵～先算兩件東西的總價，再用 700 減掉它！🐾Meow~ First find the total price of both items, then subtract from 700! 🐾

12. B 300 × 7 − 30

喵～公里和米的換算關係一定要記住喔！公里的「千」就是 1000～🐾Meow~ Estimation means rounding each number to make it easy to calculate! 🐾

13. A 6 × (3 + 2) = 6 × 3 + 6 × 2

喵！先做乘法，再做加減～或者用括號先算加減再乘！Meow! Do multiplication first, then add/subtract. Or use brackets to add first!

14. D 81

喵～括號裏先算乘法，再減，最後乘外面的 9！🐱Meow~ Inside the brackets: multiply first, then subtract. Finally multiply by 9! 🐱

15. C 21 張

喵！先做乘法，再做加減～或者用括號先算加減再乘！Meow! Do multiplication first, then add/subtract. Or use brackets to add first!