Explanation:
We are adding two numbers using a number line strategy. That means we start at the first number and move forward (to the right) by the amount of the second number.
Let’s do each problem one by one:
1.
37 + 19
Start at 37. Add 19:
You can break 19 into 10 + 9.
37 + 10 = 47
47 + 9 = 56
✔ So, 37 + 19 =
56
2.
42 + 23
Start at 42. Break 23 into 20 + 3.
42 + 20 = 62
62 + 3 = 65
✔ So, 42 + 23 =
65
3.
23 + 17
Start at 23. Break 17 into 10 + 7.
23 + 10 = 33
33 + 7 = 40
✔ So, 23 + 17 =
40
4.
66 + 25
Start at 66. Break 25 into 20 + 5.
66 + 20 = 86
86 + 5 = 91
✔ So, 66 + 25 =
91
5.
36 + 48
Start at 36. Break 48 into 40 + 8.
36 + 40 = 76
76 + 8 = 84
✔ So, 36 + 48 =
84
Let me double-check each:
- 37 + 19 = 56 ✔️
- 42 + 23 = 65 ✔️
- 23 + 17 = 40 ✔️
- 66 + 25 = 91 ✔️
- 36 + 48 = 84 ✔️
All correct.
Final Answer:
56, 65, 40, 91, 84
Parent Tip: Review the logic above to help your child master the concept of open number line subtraction worksheet.
