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

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

goldeverything · Answer

@texaschic101 can you help please :)

texaschic101 · Answer

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

goldeverything · Answer

so is the answer step 2 or step 1

texaschic101 · Answer

I would go with step 2

goldeverything · Answer

ok thank you

texaschic101 · Answer

YW :)