Question

Miles incorrectly gave the product of 7 times 2.6 as 14.14,Use a place value chart or an area model to help miles understand his mistake

Answer 1

Estimate this product first. 7 times 2 would be 14; 7 times 3 would be 21. So the actual product must be about halfway between 14 and 21, or 17.5.

The actual product 7*2.6 comes out to 18.2 (which is fairly close to 17.5, but not close at all to 14).