Let's solve each group step by step! 🎉
**1. Group a:**
You have 4 rows of 10 multiplied by 3 ones.
**Box 1:**
Group a left:
🔟 🔟 🔟 🔟
(4 rows)
Add ➕
**Box 2:**
🔟 🔟 🔟 🔟
(4 rows)
Group a right:
1️⃣ 1️⃣ 1️⃣
(3 ones)
=
**Total box:**
1️⃣ 1️⃣ 1️⃣
(3 ones)
Group a total:
3️⃣0️⃣ 3️⃣0️⃣ 3️⃣0️⃣ 3️⃣0️⃣
(4 rows × 30)
Step 1: Multiply $10 \times 3 = 30$
Step 2: There are 4 rows, so $30 \times 4 = 120$
**Answer:** $120$
**2. Group b:**
3 rows of 10 multiplied by 5 ones.
**Box 1:**
3️⃣0️⃣ 3️⃣0️⃣ 3️⃣0️⃣ 3️⃣0️⃣
(4 rows × 30)
Group b left:
🔟 🔟 🔟
(3 rows)
Add ➕
**Box 2:**
🔟 🔟 🔟
(3 rows)
Group b right:
1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣
(5 ones)
=
**Total box:**
1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣
(5 ones)
Group b total:
5️⃣0️⃣ 5️⃣0️⃣ 5️⃣0️⃣
(3 rows × 50)
Step 1: Multiply $10 \times 5 = 50$
Step 2: There are 3 rows, so $50 \times 3 = 150$
**Answer:** $150$
**3. Group c:**
5 rows of 10 multiplied by 7 ones.
**Box 1:**
5️⃣0️⃣ 5️⃣0️⃣ 5️⃣0️⃣
(3 rows × 50)
Group c left:
🔟 🔟 🔟 🔟 🔟
(5 rows)
Add ➕
**Box 2:**
🔟 🔟 🔟 🔟 🔟
(5 rows)
Group c right:
1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣
(7 ones)
=
**Total box:**
1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣ 1️⃣
(7 ones)
Group c total:
7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣
(5 rows × 70)
Step 1: Multiply $10 \times 7 = 70$
Step 2: There are 5 rows, so $70 \times 5 = 350$
**Answer:** $350$
Great job! You matched the multiplication and found the answers:
- a) $4 \times (10 \times 3) = 120$
- b) $3 \times (10 \times 5) = 150$
- c) $5 \times (10 \times 7) = 350$7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣ 7️⃣0️⃣
(5 rows × 70)