# Category Archives: Mathematics

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## Shapes and Fractions

Shapes

• Flat shapes:  circle, triangle, square, rectangle, trapezoid, hexagon
• Solid shapes:  sphere, cylinder, cone, pyramid, cube, rectangular prism

Fraction

• A part of a whole (the number on top tells how many parts are taken, the number below tells the total number of parts in a whole)
• Example:  1/2 of a pie means the pie is divided into 2 parts and 1 part is taken
• A part of a set or group of things (the number on top tells how many parts are taken, the number below tells how many smaller groups the set is divided into)
• Example:  1/3 of a box of 12 cupcakes means the 12 cupcakes are divided into 3 smaller groups and 1 group of 4 cupcakes is taken
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## Multiplication

Skip counting by 2s, 5s and 10s

Odd and even numbers

Array – a set that shows equal groups in rows and columns (repeated addition or multiplication)

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## Money

American Dollar

• penny or 1 cent (\$ 0.01) – 100 pennies = 1 dollar
• nickel or 5 cents (\$ 0.05) – 20 nickels = 1 dollar
• dime or 10 cents (\$ 0.10) – 10 dimes = 1 dollar
• quarter or 25 cents (\$ 0.25) – 4 quarters = 1 dollar
• half dollar or 50 cents (\$ 0.50) – 2 half dollars = 1 dollar
• 1 dollar or 100 cents (\$ 1.00)

Philippine Peso

• Coins:  1 centavo (P 0.01), 5 centavos (P 0.05), 10 centavos (P 0.10), 25 centavos (P 0.25), 1 peso (P 1.00), 5 pesos (P 5.00), 10 pesos (P 10.00)
• Bills:   20 pesos (P 20.00), 50 pesos (P 50.00), 100 pesos (P 100.00), 500 pesos (P 500.00), 1,000 pesos (P 1,000.00)

Problem solving

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## Time and Money

Calendar

• days in a week, month and year
• weeks in a month
• months in a year

Money

• American dollar and coins
• value of a penny (1 cent), nickel (5 cents), dime (10 cents), quarter (25 cents), half dollar (50 cents)
• different ways of making an amount (e.g., \$1.00 = 100 cents, 20 nickels, 10 dimes, 4 quarters, or 2 half dollars)

Problem solving

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## Measurement and Time

Measurement – length difference using subtraction

Line plot – to organize data

Problem solivng – using a number line or ruler, or setting up an equation

Telling time

• half past (30 minutes), quarter past or quarter after (15 minutes after), quarter to or quarter ’til (15 minutes before)
• minute hand (including skip counting by 5s)
• schedule or timetable
• 12:00 a.m. (midnight) to 11:59 a.m., and 12 p.m. (noon) to 11:59 p.m.
• elapsed time (amount of time from start to finish of an activity)