I need to find all the missing numbers in this 1-100 counting chart. Let me work through it systematically by going row by row and identifying which numbers are missing.
Let me go through each row:
Row 1 (1-10):
Has: 1, 2, 3, 4, _, 6, 7, 8, 9, 10
Missing: 5
Row 2 (11-20):
Has: 11, 12, 13, 14, 15, 16, 17, _, 19, 20
Missing: 18
Row 3 (21-30):
Has: 21, _, 23, 24, 25, _, 27, 28, 29, 30
Missing: 22, 26
Row 4 (31-40):
Has: 31, 32, 33, _, 35, 36, 37, 38, 39, 40
Missing: 34
Row 5 (41-50):
Has: 41, 42, 43, 44, _, 46, 47, 48, _, 50
Missing: 45, 49
Row 6 (51-60):
Has: 51, _, 53, 54, 55, 56, 57, 58, 59, _
Missing: 52, 60
Row 7 (61-70):
Has: 61, 62, 63, 64, _, 66, _, 68, 69, 70
Missing: 65, 67
Row 8 (71-80):
Has: _, 72, 73, _, 75, 76, 77, 78, _, 80
Missing: 71, 74, 79
Row 9 (81-90):
Has: 81, 82, _, 84, 85, _, 87, _, 89, 90
Missing: 83, 86, 88
Row 10 (91-100):
Has: _, 92, 93, 94, 95, 96, _, 98, 99, _
Missing: 91, 97, 100
Let me verify by listing all missing numbers:
5, 18, 22, 26, 34, 45, 49, 52, 60, 65, 67, 71, 74, 79, 83, 86, 88, 91, 97, 100
Let me count: that's 20 missing numbers total.
Final Answer: The missing numbers are: 5, 18, 22, 26, 34, 45, 49, 52, 60, 65, 67, 71, 74, 79, 83, 86, 88, 91, 97, 100
Parent Tip: Review the logic above to help your child master the concept of free grade 1 math worksheet.
