To solve this worksheet, we need to find the missing number (called the "missing addend") in each addition problem.
The rule is simple:
Part + Part = Whole.
If you know one part and the whole, you can find the missing part by subtracting the known part from the whole.
Let's go through them step-by-step:
1.
`__ + 4 = 46`
* Think: What number plus 4 equals 46?
* Calculation: $46 - 4 = 42$.
* Answer:
42
3.
`__ + 8 = 29`
* Think: What number plus 8 equals 29?
* Calculation: $29 - 8 = 21$.
* Answer:
21
5.
`__ + 3 = 17`
* Think: What number plus 3 equals 17?
* Calculation: $17 - 3 = 14$.
* Answer:
14
7.
`27 + __ = 27`
* Think: If you start with 27 and add something, and still have 27, what did you add?
* Calculation: $27 - 27 = 0$.
* Answer:
0
9.
`38 + 0 = __`
* Think: Adding zero doesn't change the number.
* Calculation: $38 + 0 = 38$.
* Answer:
38
11.
`__ + 0 = 67`
* Think: What number plus 0 stays 67? It must be 67 itself.
* Calculation: $67 - 0 = 67$.
* Answer:
67
13.
`__ + 7 = 27`
* Think: What number plus 7 equals 27?
* Calculation: $27 - 7 = 20$.
* Answer:
20
15.
`42 + __ = 47`
* Think: What number added to 42 makes 47?
* Calculation: $47 - 42 = 5$.
* Answer:
5
17.
`__ + 4 = 36`
* Think: What number plus 4 equals 36?
* Calculation: $36 - 4 = 32$.
* Answer:
32
19.
`__ + 0 = 19`
* Think: What number plus 0 is 19? It is just 19.
* Calculation: $19 - 0 = 19$.
* Answer:
19
Now let's do the right column:
2.
`79 + 0 = __`
* Think: Adding zero keeps the number the same.
* Calculation: $79 + 0 = 79$.
* Answer:
79
4.
`__ + 5 = 57`
* Think: What number plus 5 equals 57?
* Calculation: $57 - 5 = 52$.
* Answer:
52
6.
`82 + __ = 84`
* Think: What number added to 82 makes 84?
* Calculation: $84 - 82 = 2$.
* Answer:
2
8.
`61 + __ = 64`
* Think: What number added to 61 makes 64?
* Calculation: $64 - 61 = 3$.
* Answer:
3
10.
`21 + 3 = __`
* Think: Just add the two numbers together.
* Calculation: $21 + 3 = 24$.
* Answer:
24
12.
`29 + __ = 29`
* Think: To stay at 29, you must add nothing.
* Calculation: $29 - 29 = 0$.
* Answer:
0
14.
`40 + 6 = __`
* Think: Add 6 to 40.
* Calculation: $40 + 6 = 46$.
* Answer:
46
16.
`__ + 1 = 37`
* Think: What number plus 1 equals 37? That would be the number before it.
* Calculation: $37 - 1 = 36$.
* Answer:
36
18.
`32 + 3 = __`
* Think: Add 3 to 32.
* Calculation: $32 + 3 = 35$.
* Answer:
35
20.
`__ + 2 = 46`
* Think: What number plus 2 equals 46?
* Calculation: $46 - 2 = 44$.
* Answer:
44
Final Answer:
1. 42
2. 79
3. 21
4. 52
5. 14
6. 2
7. 0
8. 3
9. 38
10. 24
11. 67
12. 0
13. 20
14. 46
15. 5
16. 36
17. 32
18. 35
19. 19
20. 44
Parent Tip: Review the logic above to help your child master the concept of worksheet on addition for grade 2.
