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)
9
3
+ 2 ________
14
( )
2)
10
2
+ 10 ________
22
( )
3)
10
9
+ 6 ________
25
( )
4)
2
1
+ 1 ________
4
( )
5)
9
2
+ 1 ________
12
( )
6)
5
1
+ 6 ________
12
( )
7)
5
2
+ 2 ________
9
( )
8)
3
10
+ 5 ________
18
( )
9)
8
8
+ 1 ________
17
( )
10)
6
3
+ 5 ________
14
( )
1)
9
3
+ 2 ________
14
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 12.
First, add 9 and 3 to make a 12: 9+3 + 2 =
12 + 2 =
Now add 12 and 2:
12 + 2 = 14
The sum is 14.
2)
10
2
+ 10 ________
22
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 12.
First, add 10 and 2 to make a 12: 10+2 + 10 =
12 + 10 =
Now add 12 and 10:
12 + 10 = 22
The sum is 22.
3)
10
9
+ 6 ________
25
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 19.
First, add 10 and 9 to make a 19: 10+9 + 6 =
19 + 6 =
Now add 19 and 6:
19 + 6 = 25
The sum is 25.
4)
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.
5)
9
2
+ 1 ________
12
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 11.
First, add 9 and 2 to make a 11: 9+2 + 1 =
11 + 1 =
Now add 11 and 1:
11 + 1 = 12
The sum is 12.
6)
5
1
+ 6 ________
12
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 6.
First, add 5 and 1 to make a 6: 5+1 + 6 =
6 + 6 =
Now add 6 and 6:
6 + 6 = 12
The sum is 12.
7)
5
2
+ 2 ________
9
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 7.
First, add 5 and 2 to make a 7: 5+2 + 2 =
7 + 2 =
Now add 7 and 2:
7 + 2 = 9
The sum is 9.
8)
3
10
+ 5 ________
18
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 13.
First, add 3 and 10 to make a 13: 3+10 + 5 =
13 + 5 =
Now add 13 and 5:
13 + 5 = 18
The sum is 18.
9)
8
8
+ 1 ________
17
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 16.
First, add 8 and 8 to make a 16: 8+8 + 1 =
16 + 1 =
Now add 16 and 1:
16 + 1 = 17
The sum is 17.
10)
6
3
+ 5 ________
14
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 9.