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
10
+ 2 ________
14
( )
2)
9
3
+ 1 ________
13
( )
3)
10
2
+ 10 ________
22
( )
4)
10
6
+ 7 ________
23
( )
5)
2
6
+ 10 ________
18
( )
6)
2
5
+ 6 ________
13
( )
7)
6
3
+ 4 ________
13
( )
8)
7
3
+ 8 ________
18
( )
9)
2
10
+ 10 ________
22
( )
10)
7
9
+ 4 ________
20
( )
1)
2
10
+ 2 ________
14
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 12.
First, add 2 and 10 to make a 12: 2+10 + 2 =
12 + 2 =
Now add 12 and 2:
12 + 2 = 14
The sum is 14.
2)
9
3
+ 1 ________
13
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 + 1 =
12 + 1 =
Now add 12 and 1:
12 + 1 = 13
The sum is 13.
3)
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.
4)
10
6
+ 7 ________
23
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 16.
First, add 10 and 6 to make a 16: 10+6 + 7 =
16 + 7 =
Now add 16 and 7:
16 + 7 = 23
The sum is 23.
5)
2
6
+ 10 ________
18
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 8.
First, add 2 and 6 to make a 8: 2+6 + 10 =
8 + 10 =
Now add 8 and 10:
8 + 10 = 18
The sum is 18.
6)
2
5
+ 6 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 7.
First, add 2 and 5 to make a 7: 2+5 + 6 =
7 + 6 =
Now add 7 and 6:
7 + 6 = 13
The sum is 13.
7)
6
3
+ 4 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 9.
First, add 6 and 3 to make a 9: 6+3 + 4 =
9 + 4 =
Now add 9 and 4:
9 + 4 = 13
The sum is 13.
8)
7
3
+ 8 ________
18
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 10.
First, add 7 and 3 to make a 10: 7+3 + 8 =
10 + 8 =
Now add 10 and 8:
10 + 8 = 18
The sum is 18.
9)
2
10
+ 10 ________
22
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 12.
First, add 2 and 10 to make a 12: 2+10 + 10 =
12 + 10 =
Now add 12 and 10:
12 + 10 = 22
The sum is 22.
10)
7
9
+ 4 ________
20
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 16.