Decimals- Term 2 Flashcards
What is 2.34 x 4.5?
10.53
6.13 x 42?
257.46
658/3
219.3recurring
Divide 58.2 by 0.3
58.2/0.3 = 582/3 = 194
5.29 / 0.05
5.29/0.05 = 529/5 = 105.8
Given that 3.5 x 5.6 = 19.6
34x560
19600
Given that 8.4/0.2 =20.16
8.4/0.02
201.6
Handle denominator and numerator separately
Given that 34 x 56 = 1904
190.4 / 0.56
340
Because 1904/56=34
Given that 575/23 = 25
5.75 / 2.5
2.3
What is the format of standard form?
a x 10^n
In standard form, what must the power be?
An integer
In standard form, what must a in a x 10^n be?
No more than 10 and no less than 1
Write 7.3’x 104 as an ordinary number
73000
Write 4.13 x 10^-3 as an ordinary number
0.00413
Write 0.031 in standard form
3.1 x 10^-2
Work out (4x10^5)x(5x10^8) and give your answer in standard form
20x10^13
Times the first integers and add the indices
Work out (2x10^-3) / (5x10^5) and give your answer in standard form
2/5=0.4
0.4x10^-8
4x10^-9
What is 10% as a fraction?
1/10
What is 25% as a fraction?
1/4
What is 50% as a fraction?
1/2
What is 75% as a fraction?
3/4
What is 100% as a fraction?
1
What is 1% as a fraction?
1/100
What is 1/10 as a decimal?
0.1
What is 1/4 as a decimal?
0.25
What is 1/2 as a decimal?
0.5
What is 3/4 as a decimal?
0.75
How do you turn a percentage into a decimal?
Divide by 100
35% = what as a decimal?
0.35
How do you turn a percentage into a fraction?
Write it over 100
What is 35% as a fraction?
35/100=7/20
How do you turn a decimal into a percentage?
Times by 100
How do you turn a decimal into a fraction?
Multiply by 100 and write over 100
Turn 0.15 into a percentage
15%
Turn 0.32 into a fraction
32/100=16/50=8/25
How do you turn a fraction into a decimal?
Try to write it over 100 or divide the numerator by the denominator
Turn 3/8 into a decimal
3/8=300/800=37.5/100=0.375
3/8=3 divided by 8=0.375
How do you change a fraction into a percentage?
Write it over 100 or change to decimal and x100
Turn 2/3 into a percentage
200/300=2 divided by 3= 66.6recurring/100=66.6recurring%
