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Number patterns: tens up to 900
Term 4
Let us count in tens from 810 to 900.
What patterns do the circled numbers show us?
| Circled in red: Counting in | Write down the pattern: |
| Circled in green: Counting in | Write down the pattern: |
Calculate:
| a. 874 + 10 + 10 + 10 = | b. 858 – 10 – 10 – 10 – 10= |
| c. 845 + 10 + 10 = | d. 858 – 10 – 10 – 10 = |
| e. 836 + 10 = | f. 866 – 10 – 10 = |
| g. 892 + 10 + 10 + 10 = | h. 87 – 10 – 10 – 10 = |
| i. 880 + 10 + 10 = | j. 855 – 10 = |
How many sticks?
There are ten sticks 
in a bundle. 
| 1 |
|
= sticks | 10 |
|
= sticks |
| 2 |
|
= sticks | 20 |
|
= sticks |
| 3 |
|
= sticks | 30 |
|
= sticks |
| 4 |
|
= sticks | 40 |
|
= sticks |
| 5 |
|
= sticks | 50 |
|
= sticks |
| 6 |
|
= sticks | 60 |
|
= sticks |
| 7 |
|
= sticks | 70 |
|
= sticks |
| 8 |
|
= sticks | 80 |
|
= sticks |
| 9 |
|
= sticks | 90 |
|
= sticks |
| 10 |
|
= sticks | 100 |
|
= sticks |
Rows of sticks.
There are ten bundles of sticks in a row = 100 sticks
1 row of 10 bundles = 100 sticks
2 rows of 10 bundles = sticks
4 rows of 10 bundles = sticks
10 rows of 10 bundles = sticks
10 × 10 = 100
20 × 10 =
40 × 10 =
100 × 10 =
How many bundles?
700 sticks make bundles.
900 sticks make bundles.
1 000 sticks make bundles.
