Scroll:Addition - one digit >> Adding doubles >> mcq (4010)
Written Instructions:
For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..
For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.
Leave your answers in the simplest form or correct to two decimal places.
1)
2
9
+ 2 ________
13
( )
2)
2
1
+ 1 ________
4
( )
3)
8
7
+ 10 ________
25
( )
4)
8
3
+ 6 ________
17
( )
5)
6
1
+ 2 ________
9
( )
6)
8
9
+ 7 ________
24
( )
7)
9
6
+ 9 ________
24
( )
8)
6
10
+ 4 ________
20
( )
9)
8
9
+ 8 ________
25
( )
10)
9
9
+ 2 ________
20
( )
1)
2
9
+ 2 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 11.
First, add 2 and 9 to make a 11: 2+9 + 2 =
11 + 2 =
Now add 11 and 2:
11 + 2 = 13
The sum is 13.
2)
2
1
+ 1 ________
4
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 3.
First, add 2 and 1 to make a 3: 2+1 + 1 =
3 + 1 =
Now add 3 and 1:
3 + 1 = 4
The sum is 4.
3)
8
7
+ 10 ________
25
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 15.
First, add 8 and 7 to make a 15: 8+7 + 10 =
15 + 10 =
Now add 15 and 10:
15 + 10 = 25
The sum is 25.
4)
8
3
+ 6 ________
17
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 11.
First, add 8 and 3 to make a 11: 8+3 + 6 =
11 + 6 =
Now add 11 and 6:
11 + 6 = 17
The sum is 17.
5)
6
1
+ 2 ________
9
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 7.
First, add 6 and 1 to make a 7: 6+1 + 2 =
7 + 2 =
Now add 7 and 2:
7 + 2 = 9
The sum is 9.
6)
8
9
+ 7 ________
24
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 17.
First, add 8 and 9 to make a 17: 8+9 + 7 =
17 + 7 =
Now add 17 and 7:
17 + 7 = 24
The sum is 24.
7)
9
6
+ 9 ________
24
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 15.
First, add 9 and 6 to make a 15: 9+6 + 9 =
15 + 9 =
Now add 15 and 9:
15 + 9 = 24
The sum is 24.
8)
6
10
+ 4 ________
20
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 16.
First, add 6 and 10 to make a 16: 6+10 + 4 =
16 + 4 =
Now add 16 and 4:
16 + 4 = 20
The sum is 20.
9)
8
9
+ 8 ________
25
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 17.
First, add 8 and 9 to make a 17: 8+9 + 8 =
17 + 8 =
Now add 17 and 8:
17 + 8 = 25
The sum is 25.
10)
9
9
+ 2 ________
20
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 18.