Grade 6 Math – Wright

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Chapter 5

Change percent to fractions

Write number over 100 reduce to simplest form

Note: if numerator has a decimal then multiply the numerator and denominator by the same power of ten to get whole number for numerator, then put in simplest form

(see page 275)

 

Change percent to a decimal

Write number over 100 (fraction), divide numerator by denominator

(see page 276)

 

Change  fractions to a percent  

multiply the numerator and denominator by the same number to get a 100 in the denominator.

Write the numerator with the percent sign

See page 281

Note: if the denominator can not be multiplied to get a 100, change to decimal than a percent

 

Change decimal to percent

Multiply the decimal number by 100 add percent sign

See page 281

 

Change  fractions to decimals

Divide numerator by denominator

 

Change decimal to fractions

Write the number as a whole number in the numerator

Write the place value as the denominator

See top of page 282

Fractions Chapter 2

Fractions

Adding

Find  a common denominator.

Add the numerators.

Keep the denominator the same

For example: ½ + ¼ =  ½ (2/2) = 2/4 + ¼

2/4 + ¼ = ¾

 

Subtracting

Find a common denominator.

Subtract  numerators

Keep the denominator the same

Example: ½ – ¼ =  ½ (2/2) = 2/4 – ¼

2/4 – ¼ =¼

 

Multiplying

Multiply the numerator by the numerator

Multiply denominator by the denominator.

Simplify product if possible.

Example: ½ x ¼ = ⅛

 

Division

Use the formula Keep Change Flip (KCF)

Keep the Dividend change the division sign to a multiplication sign and flip the divisor.

Example:    ½ divided by ¼

               = ½ x 4/1

               = 4/2 or 2

 

 

Sept. 27, 2018 Chapter 1

For adding and subtracting Decimals:

  1. Align the numbers so that the decimals are arranged in a vertical line (one on top of the other)
  2. Perform operation add or subtract

 

For multiplying decimals:

  1. Multiply the  numbers without the decimals
  2. Count the number of digits after the decimal in both factors.
  3. Place the decimal in the product by counting back (right to left) the number of digits counted in step 2.

 

For division of a decimal by a whole number:

  1. Place the decimal point in the quotient directly above the decimal point in the dividend
  2. Divide the numbers

 

Divide decimals when the divisor has a decimal:

  1. Rewrite the divisor as a whole number
  2. Whatever we do to the divisor we do to the dividend
  3. Place the decimal in the quotient
  4. Divide