Question

Gustav is using front-end estimation. In estimating seventy-two point nine three minus twenty-eight point seven, Gustav follows the steps below. Where did he go wrong?

Step 1: seventy-two minus twenty-eight equals forty-four
Step 2: zero point nine three minus zero point seven is approximately equal to one
Step 3: forty-four plus one equals forty-five
Step 4: seventy-two point nine three minus twenty-eight point seven is approximately equal to forty-five

Step 1

Step 2

Step 3

Step 4

Answer 1

@texaschic101 can you help please :)

Answer 2

step 2 : 0.93 - 0.7 = 0.23.....not close to 1. in fact , it is 0.77 away from 1.

Answer 3

so is the answer step 2 or step 1

Answer 4

I would go with step 2

Answer 5

ok thank you

Answer 6

YW :)