Exploring Addition of Rational Numbers

This video tutorial by Mr. Murohur covers the topic of adding rational numbers, focusing on both fractions and decimals. It explains the rules for adding numbers with the same and different signs, using examples to illustrate each case. The tutorial emphasizes the importance of understanding these rules and provides step-by-step guidance on finding common denominators and aligning decimals. The lesson concludes with a reminder to seek help if needed and a recap of the key rules.

What is the first step when adding rational numbers with the same sign?

• Add the numbers and keep the sign

• Subtract the numbers and keep the sign

• Find the common denominator

• Convert to improper fractions

When adding fractions with different signs, what must you do first?

• Convert to decimals

• Find the common denominator

• Multiply the fractions

• Add the fractions directly

In the example of adding 3/4 and -1/8, what is the common denominator?

• 4

• 8

• 2

• 16

How do you convert a mixed number to an improper fraction?

• Add the numerator and denominator

• Multiply the whole number by the denominator and add the numerator

• Subtract the numerator from the denominator

• Divide the numerator by the denominator

What is the improper fraction form of -2 1/2?

• -4/2

• -7/2

• -3/2

• -5/2

When adding decimals with the same sign, what is crucial to ensure accuracy?

• Ignore the signs

• Round the numbers

• Line up the decimal points

• Convert to fractions first

What is the result of adding -1.32 and -5.81?

• -7.23

• -6.13

• -6.23

• -7.13

When adding -2.85 and 1.32, what is the first step?

• Ignore the signs

• Add the numbers directly

• Subtract the numbers

• Convert to fractions

What is the final answer when adding -2.85 and 1.32?

• -1.43

• -1.53

• -1.63

• -1.73

What should you do if the signs of the numbers are different when adding rational numbers?

• Find the common denominator

• Add the numbers and keep the sign

• Convert to improper fractions

• Subtract the numbers and keep the sign of the larger absolute value