True or False
When subtracting 2-digit numbers, we should start in the TENS column.
False
We should start in the ONES column.
24
- 13
------
11
24
- 15
------
9
15
- 5
------
10
20 rabbits are playing in the grassland. 10 of the rabbits hop away. How many rabbits are left?
10 rabbits
"more on top" means that the number on top is greater (larger).
TRUE
36
- 21
-----
15
45
- 27
------
18
27
- 17
------
10
There are 24 students in the classroom. 10 of the students go to the library. How many students are left in the classroom?
14 students
"more on the floor" means that the number on the bottom is the same as the number on top.
FALSE
"More on the floor" means that the number on the bottom is greater (larger) than the number on top.
57
-32
-----
25
52
- 15
------
37
32
- 12
------
20
There are 98 pages in Joe's workbook. He completes 28 pages in Term 1. How many pages does Joe need to complete now?
70 pages
"numbers the same, zeros the game" means that the numbers are going to play a game of baseball.
FALSE
"Numbers the same, zeros the game" means that the numbers in the ones column are the same, so zero is the difference.
78
- 46
------
32
- 19
------
59
58
- 38
------
20
Samy's mother made 36 cookies. Samy ate 8 of them. How many cookies are left?
28 cookies
When we borrow from the tens column, we get 20 more.
FALSE
When we borrow from the tens column, we get 10 more.
89
- 43
-----
46
98
- 59
------39
89
- 29
-------
60
There are 56 cars parked in the grocery store parking lot. 29 customers finish shopping and drive back home. How many cars are left in the parking lot now?
27 cars