Download Math Quick Review with X table_4th

Quotient
Divisor
(knocking at the door)
62 ÷ 7
Dividend
(on the roof)
(in the house)
7 62
is the same as
* divisor x quotient = dividend
* The dividend (in the house) is always the bigger number
* The remainder MUST be smaller than the divisor
* Find the pattern or RULE
* Rule = ÷ 2
16 , 8 , 4 , 2 , ___ * Answer = 1
÷2
÷2
÷2
÷2
about
2672
÷
8
300
8 2672
* One way to estimate quotients is by looking for compatible numbers:
2,672 is close to 2,400; 2,400 and 8 are compatible numbers because they are easy to
divide mentally. 24
*Another way to estimate quotients is by using Basic Facts:
A basic division fact that is close to 26 and divisible by 8 is: 24 ÷ 8 = ___ (3)
*A final way is to ask yourself:
Can 2 open the door for 8? NO; Can 26 open the door for 8? YES
How many times? 3 Fill in zeros after the three. My estimate is about 300
“Is ___ divisible by ___?”
2– all even #’s are divisible by 2 (0, 2, 4, 6, 8)
5 – # ends in a five or zero (5 or 0)
10 – # ends in a Zero
3 – digits add up to a number that is divisible by 3
ex. 270 is (2 + 7 + 0=9); 9 ÷ 3 = 3; So: yes, 270 is divisible by 3