Vocab
What is a rational number?
A positive or negative fractional or decimal number.
Is 2 divided by 1/4 greater than 1?
Yes!
-5 x -13
65
Is 8 - 9.3 + (-12) equivalent to 8 + (-9.3) + 12?
No. +100 to a strong explanation why.
If two numbers, a and b, have the same absolute value and are on opposite sides of zero. What would their sum be?
0
What is an integer?
A positive or negative whole number.
Is the product of this expression positive or negative?
(-4.3)(-0.25)(-5.5)(-7.9)
Positive
-14 - (-23)
9
Write the equivalent addition expression to:
-13 - (-14) - 14
-13 + 14 + (-14)
If 6 + x = y, what must be true about x for y to be a negative number.
It must be less than -6.
What is a product?
The result of multiplying one or more numbers.
-3.3 + 5.2 - 7
-5.1
-33 + 45 - 73
-61
Are the follow expressions equivalent?
-5.13 - (1.22 - 3.77) = -5.13 + (-1.22+ 3.77)
Yes! +300 for a strong explanation of why.
On Friday the temperature in Boston was -7 degrees. On the same day in California the temperature was 91 degrees warmer. What was the temperature in California?
84 degrees.
What is absolute value?
A numbers distance from zero.
A fisherman was standing on a boat that was 2.4 meters above the water. The boat rocked and he fell off decreasing his elevation by 4.9 meters. Write an expression to represent the final elevation of the fisherman.
2.4 + (-4.9) or 2.4 - 4.9
-400 รท 0
Undefined.
Write an equivalent expression using the distributive property:
-2(-3x + 4y - 20)
6x + (-8y) - (-40)
Fill in the blanks to make the equation true:
8 - ______ = 8 + _______
The numbers must be opposites!
What do we call numbers who have the same absolute value but are on opposite sides of zero? What is their sum?
Opposite, Additive Inverse, Zero Pairs. Their sum is zero.
Over the course of 4 hours the temperature changed -14.4 degrees per hour. What was the overall change in temperature?
-57.6 degrees.
-15 x 2 x -2 x -4
-240
Simplify:
4.3x - 5.1x + 13y - 7 + (-13y) + 0.8x + 3 + 4
0
If the product of 10 integers is negative, at most how many of the integers can be negative?
9