Question

1. HELP Use front-end estimation to estimate the sum 8.86 + 9.43 + 5.75

Answer 1

Answer:

1. Option D.

2. Option A.

Step-by-step explanation:

1. You need to follow these steps in order to estimate the sum of $8.86 + 9.43 + 5.75$:

Step 1: Add the digits in the ones places of the whole numbers (these are: 8, 9 and 5).

Step 2: Round the decimals to the nearest whole number:

$0.86\approx 1\\\\0.43\approx0\\\\0.75\approx1$

 Step 3: Add them together:

$8+9+5+1+0+1=8+9+5+2=24$

2. The procedure to estimate  the difference of $83.92-47.23$ is:

$83.92-\\47.23\\........\\40.00\\\ -4.00\\\ \ + 0.70\\-0.01\\...........\\+36.00\\+0\ 0.69\\..............\\36.69$

Rounded to the nearest whole number:

$36.69\approx 37$