Instructions
- Read the "Quick Notes" at the start of each section to refresh your memory.
- Show your work! For the 2-digit addition and subtraction, use the space provided to write the numbers vertically if that helps you.
- Check your signs. In the symbol section, double-check if the number got bigger or smaller.
- Take your time with the 2-step word problems. Read them twice to make sure you know what to do first!
Section 1: 2-Digit Addition
Quick Notes:
- No Regrouping: Add the ones first, then the tens.
- Regrouping: If the ones add up to 10 or more, carry the ten over to the tens column.
| Tens | Ones |
|---|---|
| 1 (carry) | |
| 2 | 5 |
| + 1 | 7 |
| 4 | 2 |
Solve the following:
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24 + 13 =
-
45 + 21 =
-
36 + 52 =
-
60 + 28 =
-
17 + 12 =
-
38 + 25 =
-
49 + 14 =
-
56 + 37 =
-
28 + 48 =
-
75 + 19 =
Section 2: 2-Digit Subtraction
Quick Notes:
- No Regrouping: Subtract the ones, then the tens.
- Regrouping (Borrowing): If the top number in the ones place is smaller than the bottom number, borrow 1 ten from the tens place.
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48 - 15 =
-
67 - 32 =
-
59 - 24 =
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85 - 41 =
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33 - 11 =
-
42 - 15 =
-
51 - 26 =
-
70 - 34 =
-
63 - 27 =
-
94 - 48 =
Section 3: Which Sign is it?
Quick Notes:
- Use + (plus) if the answer is larger than the starting numbers.
- Use - (minus) if the answer is smaller than the first number.
| Number Sentence | Sign (+ or -) | Result |
|---|---|---|
| 10 | + | 5 = 15 |
| 12 | 4 = 16 | |
| 20 | 10 = 10 | |
| 35 | 5 = 40 | |
| 18 | 6 = 12 | |
| 50 | 20 = 70 | |
| 44 | 4 = 40 | |
| 22 | 22 = 44 | |
| 60 | 30 = 30 | |
| 15 | 15 = 30 | |
| 88 | 8 = 80 |
Section 4: Three-Number Mixed Challenges
Quick Notes: Solve these from left to right. Do the first two numbers first, get an answer, then do the last step.
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10 + 20 - 5 =
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40 - 10 + 15 =
-
25 + 25 - 10 =
-
60 - 20 + 5 =
-
12 + 12 - 4 =
-
50 - 30 + 20 =
-
15 + 15 - 30 =
-
80 - 40 + 10 =
-
33 + 11 - 22 =
-
10 + 10 + 10 =
Section 5: 1-Step Problem Solving
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Sam has 24 blue marbles and 15 red marbles. How many marbles does he have in total?
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There were 45 birds on a wire. 12 birds flew away. How many birds are left on the wire?
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A baker made 36 chocolate cupcakes and 24 vanilla cupcakes. How many cupcakes did the baker make altogether?
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Lily had 50 stickers. She gave 25 stickers to her best friend. How many stickers does Lily have now?
Section 6: 2-Step Problem Solving
Quick Notes: Break these into Part A and Part B!
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Tom had 20 toy cars. His mom bought him 10 more. Then, Tom lost 5 of them. How many toy cars does Tom have now?
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There are 15 apples in a basket. Sarah adds 15 more apples. Then, her family eats 10 of the apples. How many apples are in the basket now?
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A bus started with 40 people. At the first stop, 10 people got off. At the second stop, 5 more people got off. How many people are on the bus now?
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Jake has $50. He spends $20 on a book and $10 on a toy. How much money does Jake have left?
Answer Key
Section 1: 1) 37, 2) 66, 3) 88, 4) 88, 5) 29, 6) 63, 7) 63, 8) 93, 9) 76, 10) 94 Section 2: 1) 33, 2) 35, 3) 35, 4) 44, 5) 22, 6) 27, 7) 25, 8) 36, 9) 36, 10) 46 Section 3: 16 (+), 10 (-), 40 (+), 12 (-), 70 (+), 40 (-), 44 (+), 30 (-), 30 (+), 80 (-) Section 4: 1) 25, 2) 45, 3) 40, 4) 45, 5) 20, 6) 40, 7) 0, 8) 50, 9) 22, 10) 30 Section 5: 1) 39, 2) 33, 3) 60, 4) 25 Section 6: 1) 25 (20+10=30, 30-5=25), 2) 20 (15+15=30, 30-10=20), 3) 25 (40-10=30, 30-5=25), 4) $20 (50-20=30, 30-10=20)