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)
3
7
+ 10 ________
20
( )
2)
5
5
+ 3 ________
13
( )
3)
3
10
+ 1 ________
14
( )
4)
9
1
+ 2 ________
12
( )
5)
3
5
+ 10 ________
18
( )
6)
2
4
+ 1 ________
7
( )
7)
6
5
+ 3 ________
14
( )
8)
10
10
+ 10 ________
30
( )
9)
0
4
+ 9 ________
13
( )
10)
1
9
+ 3 ________
13
( )
1)
3
7
+ 10 ________
20
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 10.
First, add 3 and 7 to make a 10: 3+7 + 10 =
10 + 10 =
Now add 10 and 10:
10 + 10 = 20
The sum is 20.
2)
5
5
+ 3 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 10.
First, add 5 and 5 to make a 10: 5+5 + 3 =
10 + 3 =
Now add 10 and 3:
10 + 3 = 13
The sum is 13.
3)
3
10
+ 1 ________
14
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 + 1 =
13 + 1 =
Now add 13 and 1:
13 + 1 = 14
The sum is 14.
4)
9
1
+ 2 ________
12
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 10.
First, add 9 and 1 to make a 10: 9+1 + 2 =
10 + 2 =
Now add 10 and 2:
10 + 2 = 12
The sum is 12.
5)
3
5
+ 10 ________
18
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 8.
First, add 3 and 5 to make a 8: 3+5 + 10 =
8 + 10 =
Now add 8 and 10:
8 + 10 = 18
The sum is 18.
6)
2
4
+ 1 ________
7
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 6.
First, add 2 and 4 to make a 6: 2+4 + 1 =
6 + 1 =
Now add 6 and 1:
6 + 1 = 7
The sum is 7.
7)
6
5
+ 3 ________
14
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 11.
First, add 6 and 5 to make a 11: 6+5 + 3 =
11 + 3 =
Now add 11 and 3:
11 + 3 = 14
The sum is 14.
8)
10
10
+ 10 ________
30
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 20.
First, add 10 and 10 to make a 20: 10+10 + 10 =
20 + 10 =
Now add 20 and 10:
20 + 10 = 30
The sum is 30.
9)
0
4
+ 9 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 4.
First, add 0 and 4 to make a 4: 0+4 + 9 =
4 + 9 =
Now add 4 and 9:
4 + 9 = 13
The sum is 13.
10)
1
9
+ 3 ________
13
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 10.