Primary 2 - Math
Chapter 2: Place Value, Addition and Subtraction up to 100
Unit 2 Mathematical Grand Review: Place Value, Operations & Money 🌟🏆
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Sensational work, brilliant Primary 2 math champions! You have completed Unit 2 with outstanding success. Let us review our major milestones: we mastered place value and expanded form up to 100, compared numbers with >, <, and = signs and ordered them, performed addition with regrouping and mental math, practiced subtraction with borrowing and real-world word problems, and learned to manage Egyptian banknotes and calculate change. Now, let us practice and prove our complete mathematical mastery!
🔢 Numbers & Place Value Review
- 🏠 Place Value: Tens place represents bundles of 10; Ones place represents units.
- 📝 Expanded Form: 78 = 70 + 8.
- ⚖️ Comparing: Compare tens first; if equal, compare ones (82 > 79).
➕➖ Operations & Money Recap
- ➕ Addition Regrouping: Carry 1 ten when ones sum ≥ 10.
- ➖ Subtraction Borrowing: Borrow 1 ten (10 ones) when top ones < bottom ones.
- 💵 Currency: Total Cost = Price A + Price B | Change = Paid - Cost.
🧩 Unit 2 Grand Review Grid
| Skill Area | Example Problem | Solution Strategy | Final Answer |
|---|---|---|---|
| Place Value | Value of 9 in 94 | Lives in tens column | 90 |
| Comparing | Compare 65 and 68 | Tens equal, 5 < 8 | 65 < 68 |
| Addition | 48 + 36 | 8+6=14, carry 1, 1+4+3=8 | 84 |
| Subtraction | 91 - 47 | 11-7=4, 8-4=4 | 44 |
| Money | Pay 50 LE for 32 LE item | 50 - 32 | 18 LE change |
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place value
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القيمة المكانية للخانة
📖 Def: positional value of a digit in a number
expanded form
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الصيغة الممتدة التفكيكية
📖 Def: decomposed sum of digit values
comparing
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المقارنة الرياضية
📖 Def: determining greater, lesser, or equal
ascending
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ترتيب تصاعدي
📖 Def: ordering from smallest to largest
descending
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ترتيب تنازلي
📖 Def: ordering from largest to smallest
regrouping
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إعادة التجميع في الجمع والطرح
📖 Def: carrying or borrowing tens across columns
sum
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المجموع النهائي
📖 Def: the result of an addition operation
difference
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الفرق أو ناتج الطرح
📖 Def: the result of a subtraction operation
currency
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العملة النقدية
📖 Def: the circulating money of a nation
change
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الباقي المسترد
📖 Def: money returned after paying more than the purchase price
Egyptian Pound
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الجنيه المصري
📖 Def: official monetary unit of Egypt
mental math
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الحساب الذهني
📖 Def: solving equations quickly in the mind
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🎉 Congratulations! You have completed all lesson stations successfully!