Wednesday, April 29, 2020

GRADE FOUR MATHEMATICS REVISION NOTE

Squares and Square roots of numbers 

1²=1x1=1
2²=2x2=4
4³=4x4x4=64

1²=1
2²=4
3²=9
4²=16
5²=25
6²=36
7²=49
8²=64
9²=81
10²=100
11²=121
12²=144
13²=169
14²=196
15²=225
16²=256
17²=289
18²=324
19²=361
20²=400
21²=441
22²=484
23²=529
24²=576
25²=625
26²=676
27²=729
28²=784
29²=841
30²=900




Place value of whole and decimal numbers.




Addition and subtraction of decimals 







Multiplication of decimals by decimals and whole numbers






Division of decimal by whole numbers and decimals



Percentages
Changing: 
percentage to fraction,

















Fraction to percentage, 

















Percentages 
to decimals

Study this table 




 Decimal to percentage




 percentage increase and decrease.


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