Number Craft Review Worksheet
Grade 3 Mathematics Unit 3 Skills Review
Number Craft Review
Name:
Date:
Part 1: "What's My Rule?" Function Tables
3.OA.4 • 3.OA.7 • 3.NBT.2
Fill in the missing in and out numbers for each table. In the last row of each table, write your own pair that fits the rule.
Problem 1 Apply Rule
Rule Subtract 50
| in | out |
|---|
| 100 | |
| 70 | |
| 160 | |
| 220 | |
| your in | your out |
Problem 2 Find the Rule
Rule
| in | out |
|---|
| 14 | 23 |
| 34 | 43 |
| 54 | 63 |
| 84 | 93 |
| your in | your out |
Problem 3 Find & Complete
Rule
| in | out |
|---|
| 18 | 48 |
| 42 | 72 |
| 65 | |
| 120 |
| your in | your out |
Part 2: Close-but-Easier Estimation
3.OA.8 • SMP1
Estimation Strategy: An estimate uses numbers that are close to the exact numbers but easier to compute mentally (such as rounding to the nearest ten or hundred).
Problem 4 322 + 487 = ?
Write your close-but-easier number sentence:
Actual answer:
Problem 5 589 + 214 = ?
Write your close-but-easier number sentence:
Actual answer:
Everyday Mathematics 4 • Grade 3 Review Turn page for Addition Strategies ➔ Page 1 of 2
Addition Algorithms Unit 3 Skills Review
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Part 3: Partial-Sums Addition
3.NBT.2 • SMP6
First write an estimate. Then calculate by adding place values separately (Hundreds, Tens, Ones) to find the total sum.
Problem 6 143 + 28 = ?
Estimate:
1 4 3
+ 2 8
Add 100s:
Add 10s (40 + 20):
Add 1s (3 + 8):
Total Sum:
Problem 7 295 + 438 = ?
Estimate:
2 9 5
+ 4 3 8
Add 100s:
Add 10s:
Add 1s:
Total Sum:
Part 4: Column Addition
3.NBT.2 • Place Value Trades
Estimate first. Add each column separately, then make place value trades from right to left if a column has 10 or more.
Problem 8 67 + 25 = ?
Estimate:
| 10s | 1s |
|---|
| 6 | 7 |
| +2 | 5 |
| column sum | column sum |
| after trade | after trade |
67 + 25 =
Problem 9 227 + 386 = ?
Estimate:
| 100s | 10s | 1s |
|---|
| 2 | 2 | 7 |
| +3 | 8 | 6 |
| add | add | add |
| trade | trade | trade |
227 + 386 =
Part 5: Strategy Check & Sense-Making
Maya solved 481 + 239. She estimated 480 + 240 = 720. Her calculated answer was 720.
Explain:
Does Maya's exact answer make sense with her estimate? Why?
Everyday Mathematics 4 • Grade 3 Review Well Done! Check your work before turning in. Page 2 of 2
