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)
7
2
+ 10 ________
19
( )
2)
9
10
+ 9 ________
28
( )
3)
1
5
+ 8 ________
14
( )
4)
7
2
+ 3 ________
12
( )
5)
10
6
+ 9 ________
25
( )
6)
3
4
+ 4 ________
11
( )
7)
9
7
+ 9 ________
25
( )
8)
5
3
+ 10 ________
18
( )
9)
5
7
+ 9 ________
21
( )
10)
2
1
+ 6 ________
9
( )
1)
7
2
+ 10 ________
19
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 9.
First, add 7 and 2 to make a 9: 7+2 + 10 =
9 + 10 =
Now add 9 and 10:
9 + 10 = 19
The sum is 19.
2)
9
10
+ 9 ________
28
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 19.
First, add 9 and 10 to make a 19: 9+10 + 9 =
19 + 9 =
Now add 19 and 9:
19 + 9 = 28
The sum is 28.
3)
1
5
+ 8 ________
14
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 6.
First, add 1 and 5 to make a 6: 1+5 + 8 =
6 + 8 =
Now add 6 and 8:
6 + 8 = 14
The sum is 14.
4)
7
2
+ 3 ________
12
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 9.
First, add 7 and 2 to make a 9: 7+2 + 3 =
9 + 3 =
Now add 9 and 3:
9 + 3 = 12
The sum is 12.
5)
10
6
+ 9 ________
25
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 + 9 =
16 + 9 =
Now add 16 and 9:
16 + 9 = 25
The sum is 25.
6)
3
4
+ 4 ________
11
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 7.
First, add 3 and 4 to make a 7: 3+4 + 4 =
7 + 4 =
Now add 7 and 4:
7 + 4 = 11
The sum is 11.
7)
9
7
+ 9 ________
25
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 16.
First, add 9 and 7 to make a 16: 9+7 + 9 =
16 + 9 =
Now add 16 and 9:
16 + 9 = 25
The sum is 25.
8)
5
3
+ 10 ________
18
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 8.
First, add 5 and 3 to make a 8: 5+3 + 10 =
8 + 10 =
Now add 8 and 10:
8 + 10 = 18
The sum is 18.
9)
5
7
+ 9 ________
21
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 12.
First, add 5 and 7 to make a 12: 5+7 + 9 =
12 + 9 =
Now add 12 and 9:
12 + 9 = 21
The sum is 21.
10)
2
1
+ 6 ________
9
SOLUTION 1 :
Hint: Start by adding first two of the numbers to make a 3.