1. round to the nearest hundred, and then subtract 4,623-3,892
a. 700
b. 600
c. 800
d. 750
2. use compatible numbers, and then divide 448 divided by 8
a. 450 ÷10 = 45
b.500÷10=50
c.500÷5=100
d. 450÷5=90
3. name the property of addition that the following equation shows 345+(452+254)= (345+452)+254
a. identity property
b. commutative property
c. associative property
d. none of the above

1. A. 731 >> 700

2. A. 450 ÷ 10 = 45 >> 56

3. C. Associative Property

Step-by-step explanation:

3. The Associative Property of Multiplication states that with the use of GROUPING SYMBOLS, no matter how you write your answer out\in-side them, you will ALWAYS get the exact same result.

2. Compatible Numbers are numbers that are easy to compute mentally, meaning that you have to physically figure out an estimate that this answer is closest to:

8 → 10

448 → 450

450 ÷ 10 = 45

448 ÷ 8 = 56

56 and 45 are close by 11, so this is the best answer.

1. 4623 - 3892 = 731 >> 700

731 rounds down to 700 because that "3" in the tens place value chart, tells the hundreds digit to start as is, and turn the rest to zeros. Always recall this:

Four or less, let it rest

Five or more, let it soar

I am joyous to assist you anytime.

"it's not the heat, it's the humidity".   that's a partly valid phrase you may have heard in the summer, but it's actually both.   the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.   this has important considerations for the human body's comfort.   when the body gets too hot, it begins to perspire or sweat to cool itself off.   if the perspiration is not able to evaporate, the body cannot regulate its temperature.   evaporation is a cooling process.   when perspiration is evaporated off the body, it effectively reduces the body's temperature.   when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.   in other words, the human body feels warmer in humid conditions.   the opposite is true when the relative humidity decreases because the rate of perspiration increases.   the body actually feels cooler in arid conditions.   there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation: