1. 24/48 = 13/n
2. 56/32 = n/20
3. 42:n :: 45:75
4. 15:9 :: n:15
5. n:12 :: 12:8
6. n:88 :: 99:72
7. 2/5 = n/40
8. 2:4 :: n:10
9. n:36 :: 13:39
10. 17:n :: 34:48
11. 36/52 = 56/n
12. n/75 = 7/25
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HOW TO USE THIS BLOG
Go down and click your grade level under LABELS.
Mr V's links
Fieri Potest Ut NasusTuus Decidat
Your nose may explode.
Mr. V is Mr. J. Velasco of the Ateneo Grade School. This blog is for his Grade 4 and 5 students, his LEAPers and for those who are not his students but are snooping here because some of my students are so chismoso and they told you. You will find stuff for review here.
Fraction Answers
SHOULD ALWAYS BE IN LOWEST TERMS
Basic Operations
Addition:
addend + addend = sum
Subtraction:
minuend- subtrahend=difference
Multiplication:
factor x factor = product
Division:
dividend ÷ divisor=quotient
Operations with Fractions
Addition/Subtraction of Like Fractions:
Add/Subtract the numerator
Addition/Subtraction of Unlike Fractions:
Change the fraction according to LCD
Add/Subtract like Like Fractions
Multiplication:
Multiply the numerators and multiply the denominators
Division:
Multiply the Dividend by the reciprocal of the Divisor
Operations with Decimals
Addition and Subtraction:
Align the decimal point. Align the places of the digits and add/subtract in the usual manner.
Multiplication:
Multiply like whole numbers. Count the number of decimal places in the factors. This number of decimal places should also be the number of decimal places in your product.
Division:
Move the decimal point of the divisor to the right until it becomes a whole number. The same number of movements should also be done to the dividend. Align the decimal point in the quotient. Divide in the usual manner. Be wary of where the decimal point should be.
Review your Language of Math Information Sheet!
addend + addend = sum
Subtraction:
minuend- subtrahend=difference
Multiplication:
factor x factor = product
Division:
dividend ÷ divisor=quotient
Operations with Fractions
Addition/Subtraction of Like Fractions:
Add/Subtract the numerator
Addition/Subtraction of Unlike Fractions:
Change the fraction according to LCD
Add/Subtract like Like Fractions
Multiplication:
Multiply the numerators and multiply the denominators
Division:
Multiply the Dividend by the reciprocal of the Divisor
Operations with Decimals
Addition and Subtraction:
Align the decimal point. Align the places of the digits and add/subtract in the usual manner.
Multiplication:
Multiply like whole numbers. Count the number of decimal places in the factors. This number of decimal places should also be the number of decimal places in your product.
Division:
Move the decimal point of the divisor to the right until it becomes a whole number. The same number of movements should also be done to the dividend. Align the decimal point in the quotient. Divide in the usual manner. Be wary of where the decimal point should be.
Review your Language of Math Information Sheet!
Changing Percent to Decimal to Ratio
Percent means per hundred
Remember
PDL - percent to decimal : left
DPR - decimal to percent : right
always 2 places
Remember
PDL - percent to decimal : left
DPR - decimal to percent : right
always 2 places
Formulas
Perimeter of a Square:
P = s x 4
Perimeter of a Rectangle:
P = (l+w) x 2
Perimeter of a Semicircle:
P = [(d x π) ÷ 2] + d
P = (r x π) + (2 x r)
Circumference:
C = d x π
C = 2 x r x π
Area:
A (square) = s x s
A (rectangle) = l x w
Volume:
V (cube) = s x s x s
V (cube) = A (base) x s
V (rectangular prism) = l x w x h
V (rectangular prism) = A (base) x h
P = s x 4
Perimeter of a Rectangle:
P = (l+w) x 2
Perimeter of a Semicircle:
P = [(d x π) ÷ 2] + d
P = (r x π) + (2 x r)
Circumference:
C = d x π
C = 2 x r x π
Area:
A (square) = s x s
A (rectangle) = l x w
Volume:
V (cube) = s x s x s
V (cube) = A (base) x s
V (rectangular prism) = l x w x h
V (rectangular prism) = A (base) x h
Label Properly
Look at the problem. Usually the question in a word problem would include words like objects?
Ex: "how many fingers will he have left if the firecracker blows up in his hand?" The unit is fingers.If it is a perimeter problem, or if it asking for just one dimension or one side of a figure, get the unit in the word problem. That is your proper label.
Ex: What is the perimeter of a square with each side that measures 90 cm? The unit/label is cm.If it is an area problem, the unit is always square unit, whichever the unit indicated in the problem is. If there is no unit, the unit is "unit." The unit can also be an object that makes up another object, like alphabet blocks or cubes.
Ex: What is the area of a square with each side that measures 90 cm? The unit/label is cm².If it is a volume problem, the unit is always cubic unit, whichever the unit indicated in the problem is. If there is no unit, the unit is "unit." The unit can also be an object that makes up another object, like alphabet blocks or cubes.
Ex: What is the volume of a cube with each side that measures 90 cm? The unit/label is cm³.
Blog Archive
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2007
(19)
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▼
March
(18)
- Perimeter, Area, Volume
- Questions from Ms. Ditalo
- Review: Multiplication of Decimals (You need this)
- Review: Addition and Subtraction of Fractions (You...
- Division of Fractions
- Multiplying Fractions
- Problem Solving for Grade 4
- Ratio
- Equivalent Ratios
- Percent to Decimals to Ratio
- Division of Fractions
- Quadrilaterals
- Triangles
- Name the Basic Geometric Idea/Figure/Polygon accor...
- Geometry. True or False.
- Multiplication of Fractions
- Volume Table for Grade 4 and 5
- Problem Solving for Grade 5
-
▼
March
(18)
Labels
- addition (2)
- decimals (1)
- division (2)
- exam review (14)
- fractions (5)
- geometry (4)
- grade 3 (1)
- grade 4 (10)
- grade 5 (12)
- multiplication (3)
- percent (1)
- problem solving (3)
- quadrilaterals (1)
- ratio (2)
- subtraction (2)
- triangles (1)
- volume (1)
Teacher
Mr. Velasco is a Math Teacher of the Ateneo Grade School. He used to teach Grades 4 and 5; he is now teaching Grades 2 and 3. He is also an MA student at the Graduate School of Liturgy of San Beda College and a member of the Pastoral Team of the Diocesan Ministry for Liturgical Affairs of the Roman Catholic Diocese of Cubao. He is part of the Guidelines, Publications and Website Committees of the DMLA. He is also Diocesan Secretary of the Ministry of Altar Servers in the Diocese of Cubao. He is a pastoral worker in the Parish of Our Lady of Perpetual Help in Project 8 and is the acting Worship Coordinator.
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