What I Have Learned
How do we estimate the product of 3- to 4- digit numbers by 2- to 3-
digit numbers?
To estimate the product, round each factor to its greatest place
value, and then multiply the rounded factors.
What I Can Do
Estimate each product. Then, compare the two estimated products.
Write the correct symbol >, < or = in the box.
1. 174 x 47
246 x 38
2. 198 x 52
624 x 23
3. 343 x 364
421 x 327
4.4 324 x 23
3 764 x 26
5. 5 435 x 213
5 645 x 197​