SME
Grade 1 Math · Problem type
Count on a number chart to 120
Use this for a piece of the 120 chart with numbers missing.
Picture
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Number 45 (shaded).
Above: 35 (in a box).
Below: 55 (in a box).
Before: 44 (in a box).
After: 46 (in a box).
This is an example. Type the numbers from your problem to start.
Number
example
Above
worked out
Below
worked out
Before
worked out
After
worked out
Number sentences
45 − 10 = 35
45 + 10 = 55
45 − 1 = 44
45 + 1 = 46
Good to know
•
Across a row, each number is 1 more.
•
Down a column, each number is 10 more.
Step-by-step
WE KNOW
Number: 45
FIND
above, below, before, after
Step 1 · Find above
45 − 10 = ?
Above is 10 less. The tens digit goes down by 1.
Above: 35
Step 2 · Find below
45 + 10 = ?
Below is 10 more. The tens digit goes up by 1.
Below: 55
Step 3 · Find before
45 − 1 = ?
Before is 1 less.
Before: 44
Step 4 · Find after
45 + 1 = ?
After is 1 more.
After: 46
Check
Put the numbers back in. Both sides should match.
45 − 10 = 35 ✓
45 + 10 = 55 ✓
45 − 1 = 44 ✓
45 + 1 = 46 ✓
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.