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प्रश्न
Evaluate:
`0 + (-2)/7`
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उत्तर
`= (0xx7)/(1xx7) - (2xx1)/(7xx1)` (LCM of 0 and 7 = 7)
`= (0-2)/7 = (-2)/7`
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संबंधित प्रश्न
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`.
Evaluate:
`4 + 3/(-5)`
Evaluate:
`(-8)/9 + -5/12`
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
`-3/4` is smaller than –2.
The rational number `(-8)/(-3)` lies neither to the right nor to the left of zero on the number line.
The rational numbers `1/2` and –1 are on the opposite sides of zero on the number line.
Arrange the numbers `1/4, 13/16, 5/8` in the descending order.
Find a rational number exactly halfway between:
`1/15` and `1/12`
