Let’s solve each train car problem one by one.
Each train has three boxes: the first and last numbers are given, and we need to find the number that goes in the middle — the number that comes *between* them.
We’ll go row by row, left column first, then right column.
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Left Column:
1.
3 _ 5 → What number is between 3 and 5?
Count: 3,
4, 5 → Answer:
4
2.
18 _ 20 → Between 18 and 20?
18,
19, 20 → Answer:
19
3.
42 _ 44 → Between 42 and 44?
42,
43, 44 → Answer:
43
4.
25 _ 27 → Between 25 and 27?
25,
26, 27 → Answer:
26
5.
57 _ 59 → Between 57 and 59?
57,
58, 59 → Answer:
58
6.
88 _ 90 → Between 88 and 90?
88,
89, 90 → Answer:
89
7.
34 _ 36 → Between 34 and 36?
34,
35, 36 → Answer:
35
8.
66 _ 68 → Between 66 and 68?
66,
67, 68 → Answer:
67
9.
20 _ 22 → Between 20 and 22?
20,
21, 22 → Answer:
21
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Right Column:
1.
54 _ 56 → Between 54 and 56?
54,
55, 56 → Answer:
55
2.
8 _ 10 → Between 8 and 10?
8,
9, 10 → Answer:
9
3.
37 _ 39 → Between 37 and 39?
37,
38, 39 → Answer:
38
4.
89 _ 91 → Between 89 and 91?
89,
90, 91 → Answer:
90
5.
77 _ 79 → Between 77 and 79?
77,
78, 79 → Answer:
78
6.
94 _ 96 → Between 94 and 96?
94,
95, 96 → Answer:
95
7.
59 _ 61 → Between 59 and 61?
59,
60, 61 → Answer:
60
8.
7 _ 9 → Between 7 and 9?
7,
8, 9 → Answer:
8
9.
13 _ 15 → Between 13 and 15?
13,
14, 15 → Answer:
14
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All answers checked by counting up from the first number to make sure the middle number is exactly one more than the first and one less than the last.
Final Answer:
Left column (top to bottom): 4, 19, 43, 26, 58, 89, 35, 67, 21
Right column (top to bottom): 55, 9, 38, 90, 78, 95, 60, 8, 14
Parent Tip: Review the logic above to help your child master the concept of numbers in between worksheet.
