2. Multiply by 10, 100, 1000
1.To multiply any number by 10 simply add a zero to the
number.
Ex:36X10=360
2.To multiply any number by 100 simply add 2 zero’s to the
number.
Ex:36X100=3600
3.To multiply any number by 1000 simply add 3 zero’s to the
number
Ex:36X1000=36000
3. Example : A box of pencils contain 48 packets.
How many in 100 boxes ?
48X100= ???? Find the answer
4. Divide by 10, 100, 1000
1.To divide any number by 10 remove a zero from the
number.
Ex: 55000÷10=5500
2.To divide any number by 100 remove two zeros from
the number.
Ex;55000÷100=550
3.To divide any number by 1000 remove three zeros
from the number.
Ex:55000÷1000=55
5. Example : A box contains 1000 cups. How many boxes
are needed to hold 7000 ?
7000 ÷ 1000 =? Find the answer
6. How to multiply 44X30?
Here is a simple and easy method:
30 can be written as 3X10
44X30=44X3X10
Step1: 44X3=132
Step2: 132X10=1320
Ans:-44X30=1320
How to multiply 600X35?
600 can written as 100X6
600X35=100X6X35
Step1: 35X6=210
Step2:210X100=21000
Ans:-600X35=21000
7. Fill in the blanks:
7000X54=-----X7X54
Step1: 54X7=----
Step2:----X-----=------
Ans:-7000X54=------
Fill in the blanks:
600X95=-----X6X95
Step1: 95X6=-----
Step2:----X------=-----
Ans:-600X95=----
8. How to divide 16000 by 200
200 can be written as 100X2
So, 200=100X2
16000÷200=16000÷100X2
Step1:16000÷100=160
Step2:160÷2=80
Ans:-16000÷200=80
How to divide 150000 by 3000
3000 can be written as 1000X3
150000÷3000=150000÷1000X3
Step1: 150000÷1000=150
Step2: 150÷3=50
Ans: 150000÷3000=50
9. Fill in the blanks:
27000÷90
90 can be written as 9X---
27000÷90=27000÷9X---
Step1:27000÷10=---
Step2:-----÷9=-----
Ans:-27000÷9=------
Fill in the blanks:
9600÷600
600 can be written as 6X----
9600÷600=9600÷6X-----
Step1:9600÷100=-----
Step2: -----÷6=-----
Ans:- 9600÷600=-----
10. 1.Multiply any number Zero is Zero however small or big the
number may be.
100X0=0
1X0=0
2.We cannot divide any number by Zero. It is meaningless.
3.Multiply any number by the digit1 the answer is the number
itself.
10X1=10
1X1=1
4.Divide any number by the digit 1 the answer the number
itself
50÷1=50
78456÷1=78456
KJ
