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Question 1

Two important properties of reciprocals

Answer 1

1. 1 and -1 are the only numbers equal to their reciprocals
2. 0 is the only number without a reciprocal

Question 2

Integer

Answer 2

Ganze Zahl (Z), positiv und negativ

Question 3

Bow tie method to compare size of fractions: ex 7/9 or 6/8 is larger?

Answer 3

Cross multiply, larger number is larger fraction: 7x8=56 and 9x6=54, therefore 7/9 is larger fraction

Question 4

Bow tie method expressed using a/b and c/d

Answer 4

If a,b,c,d are positive then a/b > c/d only if ad > bc

Question 5

1/6

Answer 5

0.167

Question 6

1/7

Answer 6

0.143

Question 7

1/9

Answer 7

0.111

Question 8

1/8

Answer 8

0.125

Question 9

0!

Answer 9

0! =1

Question 10

1!

Answer 10

1! =1

Question 11

2x + 3x vs 20-1+30-1 in which case can I factorize (ausklammern)

Answer 11

Ausklammern NUR beim multiplizieren NICHT addieren,

Also x(2+3) aber NICHT -1(20+30)

Question 12

Kann man bei Brüchen nur bei Multiplikationen oder auch bei additionen kürzen

Answer 12

Nur bei Multiplikationen