🔢 Part 1: Partitioning Strategy

Partitioning means breaking numbers into hundreds, tens, and ones to make adding or subtracting easier.

Example: 243 + 135 → (200 + 100) + (40 + 30) + (3 + 5) = 300 + 70 + 8 = 378

Hundreds: _____ + _____ = _____

Tens: _____ + _____ = _____

Ones: _____ + _____ = _____

Answer: _____

Hundreds: _____ − _____ = _____

Tens: _____ − _____ = _____

Ones: _____ − _____ = _____

Answer: _____

Hundreds     Tens     Ones

_______          _______       _______

+ _______       + _______     + _______

= _______       = _______     = _______

Total: _____

🔄 Part 2: Regrouping & Rearranging

Regrouping is when you trade 10 ones for 1 ten (or 10 tens for 1 hundred) when adding or subtracting.

a) 347 + 285 = _____

b) 623 − 178 = _____

Now solve it: 199 + 46 = _____

Missing digit: _____

📖 Part 3: Word Problems

Read each problem carefully. Show your working and write a number sentence.

Number sentence: _____ + _____ = _____

Answer: ___________________________

Number sentence: _____ − _____ = _____

Answer: ___________________________

Step 1 (total saved): _____ + _____ = _____

Step 2 (after spending): _____ − _____ = _____

Answer: ___________________________

My number sentence: _____________________________

Answer: _____________________________