Adding Tens
3 tens + 5 tens=
8 tens or 80
What is 20 + 10?
30.
Fill in the blank. 5, 10, ___
15
20 + 32 =
What is 52
12 and 21
12 < 21
2 tens + 3 tens =
5 tens or 50
Start at 25, Move down 2 rows. Where are you now?
45,
first 25 +10=,
35+10=,
,45
Fill in the blank. 25, 30, ___
35.
38 + 40 =
78
45 and 65
45 < 65
80 + 1 ten =
9 tens or 90
To add 40, you move this many rows down the hundred chart.
4 Rows
To add 15, you jump by 5 how many times on the chart?
3.
61 + 42 =
What is 103
355 and 355
355 = 355
7 tens + 3 tens =
10 tens or 100
If you start at 43 and move 3 rows down the hundred chart, you end on this number. What is the number you land on?
73,
43+10=53
53+10=63
63+10=73
To add 20, you jump how many times on the chart?
4.
54 + 30 =
84
176 and 171
176 > 171
3 tens + 100
13 tens or 130
If you start at 77 and add two 10s, what number are you on?
97.
If we skip count by 5s, what two numbers will ALWAYS be in the ones place?
5 and 0.
37 + 29 =
66
278 and 287
278 < 287