Find the value of 
.
Answer: A = 5
Câu 2:
Find the value of 
.
Answer: A = 4
Câu 3:
Find the value of 
.
Answer: A = 25
Câu 4:
Given that M is the midpoint of the segment AB. Calculate the length of the segment MB if AB = 10cm.
Answer: MB = 5 cm
Câu 5:
Find the smallest negative integer that is greater than -100.
Answer: It is - 99
Câu 6:
Given a segment AB = 4cm. Let C be a point such that A is midpoint of segment CB. Find the length of segment CA.
Answer: CA = 4 cm
Câu 7:
Given that the distance from point a to point -1 on the number line is 7. Find a if a < 0.
Answer: a = - 8
Câu 8:
Find the opposite number of 
.
Answer: It is - 28
Câu 9:
Determine the last two digits in 
.
Answer : 81
Câu 10:
Given a segment AB = 100cm. Let C be a point between A and B. Let M, N be respectively the midpoint of the segment BC, AC. Find the length of the segment MN.
Answer : MN = 50 cm
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