What's My Rule?
10, 20, 30, 40
What is my rule?
Add 10
44 + 77 = ?
121
71 - 46 = ?
25
You are arranging chairs for a class show. You need 3 rows of 5. Then you add another row. How many total chairs do you need?
20 chairs
There are 5 rows of 4 chairs for a class show. 4 people are not coming, so you need 4 fewer chairs. How many total chairs do you need?
16 chairs
In: 3 Out: 6
In: 6 Out: 12
In: 8 Out: 16
What's my rule?
Multiply by 2
58 + 96 = ?
154
65 - 47 = ?
18
Javon has 2 rows of 8 onions in his garden. He wants to add another row to his garden. How many onions will he have total?
24 onions
Danielle has 10 toy tricycles that each have 3 wheels. Danielle lost 1 tricycle. How many total wheels are there now?
27 wheels
In: 14 Out: 23
In: 34 Out: 43
In: 44 Out: 53
In: 64 Out: ?
73
145 + 322 = ?
467
182 - 56 = ?
126
Jamila has 5 shelves of books with 7 books on each shelf. Her sister gives her 7 more books to fill a new shelf. How many books does she have now?
42 books
There are 10 cars in a parking lot, each with 4 wheels. One car leaves the parking lot. How many wheels are there in the parking lot now?
36 wheels
In: 100 Out:50
In: 50 Out: 0
In: 70 Out: 20
What's my rule?
Subtract 50
124 + 215 = ?
339
341 - 225 = ?
116
Mrs. Patterson has 4 rows of 3 chairs in each row in her classroom. She needs to add another row of chairs for some of 3H's class. How many chairs does she need total?
15 chairs
There are 8 chairs in the classroom. Each chair has 4 legs. One chair is taken out. How many legs are in the classroom now?
28 legs
In: 1 Out: 5
In: 5 Out: 25
In: 4 Out: 20
In: 6 Out:
30
366 + 208 = ?
574
653 - 447 = ?
206
A farmer grows 10 rows of 10 corn stalks. He wants to add an extra row. How many corn stalks will he have then?
110 corn stalks
There are 12 students in the classroom, each with 2 legs each. Two students leave the classroom. How many legs are in the classroom now?
20 legs