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WARRIOR [948]
3 years ago
14

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

Mathematics
1 answer:
marta [7]3 years ago
5 0

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

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