Elementary School Lessons

Skip Counting by:

2s – 2 4 6 8 10 12 14 16 18 20

3s – 3 6 9 12 15 18 21 24 27 30

4s – 4 8 12 16 20 24 28 32 36 40

5s – 5 10 15 20 25 30 35 40 45 50

10s – 10 20 30 40 50 60 70 80 90 100

Rounding Off Numbers

Rounding off a number to the nearest 10, 100 or 1000 mean choosing a multiple of 10, 100 or 1000 that is closest to the given number.

If the given number is exactly halfway between two multiples of 100 or 1000, round off the number to the greater multiple.

Math Prep Arranging Numbers

Arrange the numbers from the least to the greatest:

91 93 94 92

Arrange the numbers from the greatest to the least:

28 27 30 29

Numbers BEFORE, AFTER and BETWEEN

Write the number before the given numbers:

____ 100 ____58

Write the number that comes after the given numbers:

39____ 82_____

Write the numbers that come between the given numbers:

29 ___ 31 64___66

Numbers in Expanded Form

• Another way of writing a Hindu-Arabic number is using expanded form, wherein the values of the digits are combined from left to right.

135 = 100 + 30 + 5

Reading and Writing Numbers

To write number in words:

1. Give the value of the digit starting from the leftmost digit.

2. Separate the thousand from the hundred with a comma.

3. Number words such a twenty-one, thirty-four and forty-six and so on, are written with a hyphen.

Math Prep

Counting up to 100

1. Counting up to 100.
2. Writing the missing numbers.

TENS and ONES

2 tens and 6 ones = 26

5 tens and 7 ones = 57

Place Values of Four-Digit Numbers

• Every digit in a given number has its own place value.

• Starting from the right, the place values of a four-digit number are the ones, tens, hundreds, and thousands.

• The value of a digit depends on its place or position in a given number.