Okay, my daughter is 9 now and since she started school they've taught her to do math by estimation, and as a result I feel she's struggling because of that. Now they want her to get exact answers but for years have told her to estimate the answer and while I've worked with her at home to get exact answers she'd get upset with me and has struggled to learn her math facts, she finally has addition down but is now struggling with multiplications and division because it requires EXACT answers not estimations.
Well, she had homework tonight that says "Estimate then multiply to get the answer" one of the numbers was 4,456--now, the way I was taught to estimate is you start in the ones column and work your way up. She says "No, mom, you start with the first two numbers." Am I wrong? Have things changed that much?