Real-world examples of 2-digit by 1-digit multiplication using the standard algorithm.

📚 Quick Study Guide

🔢 Standard Algorithm: A step-by-step method for solving multiplication problems. It involves multiplying each digit of one number by each digit of the other number, then adding the results. 📝 Step 1 (Setting Up): Write the numbers vertically, one above the other. Place the number with more digits on top. ➕ Step 2 (Multiplying): Multiply the ones digit of the bottom number by each digit of the top number, starting from the right. Carry over when the result is 10 or more. ➕ Step 3 (Multiplying the Tens Digit): If you had more than one digit in the bottom number, you would multiply the tens digit of the bottom number by each digit of the top number, adding a zero as a placeholder in the ones place. ➕ Step 4 (Addition): Add the partial products (the results from each multiplication step) to get the final answer. 💡 Tips: Practice makes perfect! Use graph paper to keep your columns aligned. Double-check your work to avoid errors.

Practice Quiz

1. What is the product of $23 \times 3$?
1. 59
2. 69
3. 79
4. 89
2. A farmer has 12 rows of apple trees. Each row has 7 trees. How many apple trees does the farmer have in total?
1. 74
2. 84
3. 94
4. 64
3. What is $31 \times 5$?
1. 155
2. 165
3. 145
4. 175
4. A box contains 25 crayons. How many crayons are there in 4 boxes?
1. 80
2. 90
3. 100
4. 75
5. Calculate $42 \times 2$.
1. 64
2. 74
3. 84
4. 94
6. A student reads 15 pages of a book each day. How many pages does the student read in 6 days?
1. 80
2. 90
3. 70
4. 60
7. Solve: $11 \times 8$.
1. 78
2. 88
3. 98
4. 68