qui tắc dấu ngoặc
Quiz
•
Mathematics
•
1st - 5th Grade
•
Hard
Thai hong
Used 25+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5-(-4)
9
1
-1
-9
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bỏ ngoặc cho biểu thức 12-(8-10).
12+8-10
12-8+10
12-8-10
-12+8-10
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Khi bỏ dấu ngoặc trong biểu thức số: 2003 - (5 - 9 + 2002) ta được:
2003 + 5 - 9 - 2002
2003 - 5 - 9 + 2002
2003 - 5 + 9 - 2002
2003 - 5 + 9 + 2002
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn khẳng định đúng ?
Khi bỏ dấu ngoặc đằng trước có dấu trừ ta giữ nguyên dấu của các số hạng trong ngoặc.
Khi bỏ dấu ngoặc đằng trước có dấu cộng ta đổi dấu các số hạng trong ngoặc.
Khi bỏ dấu ngoặc đằng trước có dấu trừ ta phải đổi dấu các số hạng trong ngoặc.
Khi bỏ dấu ngoặc ta luôn luôn giữ nguyên dấu của các số hạng.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
-71 +83 -49 -93
71 +83 -49 -93
-71 -83 +49 +93
-71 +83 +49 +93
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