Advertisements
Advertisements
प्रश्न
Evaluate:
`2 + (-3)/5`
उत्तर
`2/1 - 3/5`
(LCM of 1 and 5 = 5)
`= (2xx5)/(1xx5) - (3xx1)/(5xx1)`
`= (10-3)/5 = 7/5 = 1 2/5`
APPEARS IN
संबंधित प्रश्न
Represent these numbers on the number line
`7/4`
Show the following numbers on a number line. Draw a separate number line for the example.
`7/5 , (-2)/5 , (-4)/5`
The number `sqrt2` is shown on a number line. Steps are given to show `sqrt3` on the number line using `sqrt2`. Fill in the boxes properly and complete the activity.
Activity :
- The point Q on the number line shows the number ______.
- A line perpendicular to the number line is drawn through the point Q. Point R is at unit distance from Q on the line.
- Right angled ∆ORQ is obtained by drawing seg OR.
`l ("OQ") = sqrt2` , `l("QR") = 1`
`therefore` by Pythagoras theorem,
`[l("OR")]^2 = [l("OQ")]^2 + [l("QR")]^2 `
= `square^2`+ `square^2` = `square` + `square`
= `square`
∴ l(OR) = `square`
Draw an arc with centre O and radius OR. Mark the point of intersection of the line and the arc as C. The point C shows the number `sqrt3`.
Show the number √5 on the number line.
Evaluate:
`0 + (-2)/7`
Draw a number line and mark
`3/4, 7/4, (-3)/4 and (-7)/4` on it.
Draw a number line and mark
`2/3, (-8)/3, 7/3, (-2)/3 and -2`
Find the rational numbers represented by the question marks marked on the following number line
Draw a number line and represent the following rational numbers on it
`(-17)/(-5)`
Find a rational number exactly halfway between:
`5/(-13)` and `(-7)/9`
