Elective 6- lesson 2

Elective 6- lesson 2

​Aim

• Real numbers (Whole numbers, Fraction, Decimal)

• Addition of Real Numbers 

• Subtraction of Real Numbers

• Multiplication of Real Numbers 

• Division of Real Numbers​

​Addition

​​Addition is among the basic operations in arithmetic. In simple forms, addition combines two or more values into a single term, for example: 2 + 5 = 7, 6 + 2 = 8.

​Subtraction

​​Subtraction can be labelled as the inverse of addition. It computes the difference between two values, i.e., the minuend minus the subtrahend. If the minuend is greater than the subtrahend, the difference is positive. If the minuend is less than the subtrahend, the result is negative, and 0 if the numbers are equal.

​Multiplication

​​Multiplication also combines two values like addition and subtraction into a single value or the product. The two original values are known as the multiplicand and the multiplier, or simply both as factors.

The product of a and b is expressed as a·b or a x b. In software languages wherein only characters are used that are found in keyboards, it is often expressed as, a*b (* is called asterisk).

​Division

​​The division is the inverse of multiplication. It computes the quotient of two numbers, the dividend that is divided by the divisor. The quotient is more than 1 if the dividend is greater than divisor for any well-defined positive number, else it is smaller than 1.

Multiple Choice

What is the sum of 45,009 and 3,008?

• 48,017

• 50,009

• 45,897

• 43,009

Multiple Choice

Find the difference. 67,893 - 42,642. 

• 25,786

• 54,876

• 25,251

• 65,897

Multiple Choice

What is the sum of 456,905 and 34,145?

• 34,000

• 491,050

• 500,000

• 537,843

Multiple Choice

Find the difference. 100,000 - 45,060 

• 43,940

• 54,940

• 56,897

• 67,943

​How do we add or subtract whole numbers?

​

​We align them first!

Multiple Choice

Find the sum. 46,789 + 34,905

• 78,987

• 81,694

• 80,000

• 56,351

Multiple Choice

Find the difference. 67,435 - 45,789

• 25,435

• 21,646

• 54,287

• 35,634

Multiple Choice

528 - 173 =

• 355

• 619

• 455

• 247

Multiple Choice

76 - 39 = ______

• 38

• 115

• 37

• 40

Multiple Choice

Find the sum. 86,954,934 + 23,951,124

• 110,906,057

• 110,906,058

• 110,906,056

• 110,906,158

Multiple Choice

Find the difference. 86,954,934 - 23,951,124

• 63,003,810

• 62,003,811

• 63,002,811

• 61,003,810

​Let's Multiply!

Multiple Choice

83 x 74

• 5142

• 6142

• 642

• 7412

Multiple Choice

92 x 14

• 2288

• 460

• 1288

• 1278

​How do we multiply?

​

Multiple Choice

20 x 27

• 1540

• 5040

• 540

• 110

Multiple Choice

76 x 45

• 2420

• 3430

• 420

• 3420

Multiple Choice

65 x 24

• 1560

• 390

• 2560

• 1660

Multiple Choice

There are 45 children in the classroom, each student will get 27 pencils. How many pencils will the teacher to give out?

• 72

• 1215

• 1512

• 405

Multiple Choice

There are 14 calories in a candy bar. How many calories are there in 42 candy bars?

• 84

• 578

• 588

• 568

Multiple Choice

Tim has 10 dozen golf balls. How many golf balls does he have? You must know how many are in a dozen first.

• 12

• 1200

• 120

• 357

​Division of Whole numbers

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