Math

BEFORE, BETWEEN AND AFTER NUMBERS (SEPT.5.2012)

Before (antes)
1. What number comes before 29?
    answer: 28

2. What number comes after 32?
    answer: 33

3. What number comes between 40 and 42?
     answer: 41




TENS AND ONES (sept. 4.2012)

 Tens are numbers in groups of 10.
 Ones are numbers between 1 and 9.
 Together their positional value is like this:

                     3 5
            TENS / ONES
 3: tens ( 3 tens makes 30)
 5: ones ( 5 ones)
 In the end is: 30 + 5 = 35

 3 TENS  +  5  ONES is = 35 


 o   o   o
 o   o   o
 o   o   o
 o   o   o          o  o
 o   o   o             o
 o   o   o            oo
 o   o   o
 o   o   o
 o   o   o
 o   o   o


Here it is another explanation:

 TENS AND ONES - mini lesson

Here are some exercises. PRACTICE!!!

TENS AND ONES EXERCISE



Counting by 2's , 3's and 5.



 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30.

3,6,9,12,15,18,21,24,27,30,33

5,10,15,20,25,30,35,40,45,50


BEFORE, AFTER and BETWEEN NUMBERS

What number comes before (antes) of number  26?
  ____ 26, 27, 28



 What number comes after (después) of number 55?

  54, 55, _____

  What number comes between (entre) 78 and 80?

a. 55
b. 26
c. 79