Addition
9 + 8 = ______
What is 17?
9 - 4 = ______
what is 5?
9 x 2 =
What is 18?
1,000 / 1 =
What is 1,000?
Adding the same number over and over (repeatedly)
What is repeated addition?
10 + 29 = _____
What is 39?
17 - 3 = _____
What is 14?
18 x 2 =
What is 36?
12 / 3 =
What is 4?
Rows with equal amount in each
What is an array?
25 + 31 = ____
What is 56?
50 - 25 = _____
100 x 7 =
What is 700?
20 / 5 =
What is 4?
Examples of this strategy are:
2, 4, 6, 8, 10, 12
3, 6, 9, 12, 15, 18
5, 10, 15, 20, 25
What is skip counting?
120 + 259 = _____
What is 379?
199 - 88 = ______
What is 111?
200 x 20 =
What is 4000?
100 / 10 =
What is 10?
To find the missing number, I use this subtraction strategy. Here is an example:
7 - ____ = 4
What is adding up or add to subtract?
521 + 19 = ______
What is 540?
980 - 280 = _____
What is 700?
1000 x 100 =
What is 100,000?
1,000 / 1,000 =
What is 1?
This is a model used to multiply multi-digit numbers like 14 x 12.
What is an area model?