Answer:
This is a complete lesson with instruction & exercises for 5th grade about multiplying decimals by decimals. The interpretation for multiplying a decimal by a decimal is to think of it as taking a fractional part of a decimal number (the symbol × translates to "of"). The lesson compares multiplication by a decimal to scaling & shrinking a stick. Lastly, it shows the common shortcut to decimal multiplication (multiply as if there were no decimal points; the answer has as many decimals as the factors have in total.)
In the video below, I explain the rule for multiplying decimals (put as many decimal digits in the answer as there are in the factors.) I explain where this rule comes from, using fraction multiplication. The lesson continues below the video.
If you would like to know the height of the tree 10 years from now, you can calculate this using the following steps:
h ... the height of the tree 10 years from now
h = 30 feet + 5 feet = 35 feet
The correct result would be D. 35 feet.
Given,
The four numbers are consecutive
The numbers are
x
x + 1
x + 2
x + 3
Sum = -34
x + (x + 1) + (x + 2) + (x + 3) = -34
x + x + 1 + x + 2 + x + 3 = -34
(x + x + x) + (1 + 2 + 3) = -34
3x + 6 = -34
3x = -34 - 6
3x = -40
x = -40/3
