Vocabulary
What does it mean to Decompose?
Break apart
-7
1
Represent this number using base ten blocks.
97
9 tens 7 ones
Adjust to solve, 49-23
add 1 or 2, answer is 26
Milly decomposes 47 to subtract 92-47. What is one way to decompose 47
40+7 or 45+2
I do what when I break apart 1 ten into 10 ones?
regroup
-12
11
Represent this equation using base ten blocks.
43-12
3 tens 1 one
Use a number line to solve the equation 40-20
teacher check
Elden uses friendly numbers to subtract 72-37. Which equation could he write?
A.70-35 B. 70-37
C. 70-39 D. 74-34
A
The _______ is the answer to a subtraction problem.
Sum, Decompose, Difference, Regroup, adjust, place value
Difference
-34
40
Use Base ten shorthand to solve this equation.
54-12
4 tens 2 ones solved using a t chart
Use a number line to solve the equation 62-51
teacher check, answer is 11
Pablo sells 51 pumpkins at the farmer's market. Joe sells 38 pumpkins. How many more pumpkins does Pablo sell than Joe?
51-38=? ?=13
In the equation 2+3=5, the 2 and 3 are what?
addends
-19
13
Use base ten blocks to solve this equation.
64-44
4 tens 0 ones
Adjust the numbers to solve, 67-42
add 3 or subtract 2 from both sides, answer is 25
There are 72 people waiting in line to ride the roller coaster. When the ride stops, 16 people get on the roller coaster. Then 24 people exit the line. How many people are in the waiting line now?
32 people
In the equation 2+3=5 the 5 is what?
Sum
-49
48
Solve this equation using base ten blocks.
91-52
3 tens 9 ones
Represent this problem on a number line.
75-38
start at 75 go back 38 or start at 38 and jump up to 75
Amily has 67 days to develop a part for an airplane. She has already works 29 days. How many days does she have left to develop the airplane part? On day 32 how many days does she have left?
38 days and 35 days