paramaths

Sometimes it's difficult to calculate expressions involving decimals.
Learn some useful tips using fractions.

Examples:
m

35 x 0,2 = 35 x 1/5 = 35 : 5 = 7

24 x 0,5 = 24 x 1/2 = 24 : 2 = 12
44 x 0,25 = 44 x 1/4 = 44 : 4 = 11

60 x 0,75 = 60 x 3/4 = 60 x 3 : 4 = 45

---------------------------------------------------------

7 : 0,2 = 7 : 1/5 = 7 x 5 = 35
12 : 0,5 = 12 : 1/2 = 12 x 2 = 24
11 : 0,25 = 11 : 1/4 = 11 x 4 = 44
45 : 0,75 = 45 : 3/4 = 45 x 4/3 = 60

SIMULTANEOUS LINEAR EQUATIONS

TO KNOW MORE ABOUT SYSTEMS OF LINEAR EQUATIONS:
themathpage.com/simultaneous-equations
bbc.co.uk/schools/gcsebitesize/maths/simultaneoushirev1
mathplanet.com/solving-systems-of-equations-in-two-variables

WORD PROBLEMS USING SYSTEMS OF EQUATIONS

SOME PROBLEMS CAN BE SOLVED USING SYSTEMS OF EQUATIONS:

lINEAR EQUATIONS SYSTEMS:
regentsprep.org/pracword

NON LINEAR EQUATIONS SYSTEMS:
regentsprep.org/quadLineaSyspractice