🎯 Part 1: Rounding Numbers

a) 47 rounds to ______

b) 83 rounds to ______

c) 25 rounds to ______

d) 156 rounds to ______

a) 234 rounds to ______

b) 567 rounds to ______

c) 850 rounds to ______

d) 149 rounds to ______

📊 Part 2: Estimation Practice

Example: 48 + 27 → 50 + 30 = 80

a) 34 + 29 → _____ + _____ = _____

b) 67 + 45 → _____ + _____ = _____

c) 156 + 238 → _____ + _____ = _____

a) 73 - 28 → _____ - _____ = _____

b) 245 - 167 → _____ - _____ = _____

✅ Part 3: Using Inverse Operations to Check

a) 45 + 37 = 82

Check: 82 - 37 = _____ ✓ or ✗

b) 91 - 46 = 45

Check: 45 + 46 = _____ ✓ or ✗

c) 128 + 75 = 203

Check: 203 - 75 = _____ ✓ or ✗

If 56 + 29 = 85, then 85 - 29 = ______

If 74 - 38 = 36, then 36 + 38 = ______

📝 Part 4: Word Problems

Estimate: _____ + _____ = about _____ stickers

Exact answer: _____ stickers

Check your answer: _____ - _____ = _____

Estimate: _____ - _____ = about _____ students

Exact answer: _____ students

Check your answer: _____ + _____ = _____

Estimate: $ _____ + $ _____ = about $ _____

Exact answer: $ _____

💭 Part 5: Estimation Language

a) 48 is _____________ 50

b) 156 + 234 is _____________ 400

c) 73 - 28 is _____________ 45

d) 299 is _____________ 300

A packet of lollies costs $3.85 and a drink costs $2.15. About how much do they cost together?

Explain your choice:

🌟 Part 6: Challenge Questions