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Question

Question
Use basic facts and place-value strategies to find each product.

(1 point)
10×10=

Choose

30×20=

Choose

70×40=

Choose

90×30=

Choose

Remaining Attempts : 3
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Answer 1

Sure! Let's calculate each product using basic facts and place-value strategies.

1. \( 10 \times 10 = 100 \)

2. \( 30 \times 20 = 600 \)
   (You can think of it as \( 3 \times 2 = 6 \), and then add the two zeros from \( 30 \) and \( 20 \) to get \( 600 \).)

3. \( 70 \times 40 = 2800 \)
   (This can be seen as \( 7 \times 4 = 28 \), then adding the two zeros from \( 70 \) and \( 40 \) to get \( 2800 \).)

4. \( 90 \times 30 = 2700 \)
   (Here, it's \( 9 \times 3 = 27 \), and adding the two zeros from \( 90 \) and \( 30 \) gives \( 2700 \).)

So, the answers are:

1. \( 100 \)
2. \( 600 \)
3. \( 2800 \)
4. \( 2700 \)