Multiplying Rational Numbers
Adding Rational Numbers
Subtracting Rational Numbers
Dividing Rational Numbers
Complete the sentence
100
(-4) * 5 =
-20
100
7.824 + 23.5=
31.324
100
38.134 – 31.9=
6.234
100
60 / 5
12
100
Only when subtracting rational numbers we use
__ __ __
stands for _____, ______, ______
When subtracting rational numbers we use KCC stands for keep, change, change.
200
-5 * -5 =
25
200
-14 + -8
-22
200
- 20 - (-4) =
-16
200
-14/2
-7
200
When multiplying or dividing a positive by a positive we get a ______ signed number.
When multiplying or dividing a negative by a negative we get a _______ signed number.
positive
positive
When multiplying the same signs together, the answer will be a positive signed number
300
9 * -7 =
-63
300
-13 13/10 or -14 3/10
300
-3 4/10 or -3 2/5
300
-34.6/2
-17.3
300
When multiplying or dividing a positive by a negative we get a _______ signed number.
When multiplying or dividing a negative by a positive we get a ________ signed number.
negative
negative
When multiplying different signs together, the answer will be a negative signed number.
400
-79.3 * 3 =
-237.9
400
–33 + 91
58
400
–3.37 – 9.668
-13.038
400
542.7/-9
-60.9
400
When adding two numbers of different signs we _______ the number with the smaller _____________ from the number with the bigger _____________.
We subtract the number with the smaller value from the number with the bigger value.
500
-634 * -5.4 =
3423.6
500
–16 + –25
-31
500
5 7/6 or 6 1/6
500
-5/6 divide 1/3
-15/6 or -2 3/6 or -2 1/2
500
When dividing fractions we _____ the second fraction so that the _denominator_____ is on top and the _numerator_____ is on the bottom.
We call the second fraction a _________.
Then we multiply straight across.
Flip the second fraction so that the denominator is on top and the number is on the bottom.
The second fraction is called a reciprocal.
Then we multiply straight across.