Question

1. What are the sign-changing rules for integers? list for addition, subtraction, and multiplication.
2. what is cross multiplication? explain with an example.
3. what is distributive property? explain with an example.

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Answer 1

1th photo answer of 1)

2th photo answer of 2)

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Answer 2

Answer:

1) + and + = +

– and – = +

+ and – = –

2) cross multiplication is usually used in fractions.

3) distributive property means expanding a number and solving in different way.

eg :-

45 × 105

= 45 × (100+5)

= (45 × 100) + (45 × 5)

= 4500 + 225

= 4725