Find the product of ( 18)× ( 10)× 9( 18)× ( 10)× 90ex0ex=180× 9 [( ) × ( ) = +]0ex0ex=1620Hence, ( 18)× ( 10)× 9 is 1620. ...

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Standard VIII

Mathematics

Letters for Digits

Solve: -18× -...

Question

Solve: $(- 18) \times (- 10) \times 9$

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Solution

Find the product of $(- 18) \times (- 10) \times 9$
$(- 18) \times (- 10) \times 9 = 180 \times 9 [(-) \times (-) = +] = 1620$
Hence, $(- 18) \times (- 10) \times 9$ is $1620$ .

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Similar questions

Study the pattern and answer the following:

$18 \times 1 = 18$

$18 \times 2 = 36$ (add $2$ tens and $2$ ones less than $18$ i.e. $[20 + 16]$ )

$18 \times 3 = 54$ (add $2$ tens and $2$ ones less than $36$ i.e. $[20 + 34]$ )

$18 \times 4 = 72$ (add $2$ tens and $2$ ones less than $54$ i.e. $[20 + 52]$ )

Now, continue this pattern

$18 \times 5 = . . . . . . . . . 18 \times 6 = . . . . . . . . . 18 \times 7 = . . . . . . . . . 18 \times 8 = . . . . . . . . . 18 \times 9 = . . . . . . . . . 18 \times 10 = . . . . . . . . .$

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Solve: (-18)×(-10)×9

Find the product of (-18)×(-10)×9(-18)×(-10)×9=180×9[(-)×(-)=+]=1620Hence, (-18)×(-10)×9 is 1620.

Solve: $(- 18) \times (- 10) \times 9$

Find the product of $(- 18) \times (- 10) \times 9$
$(- 18) \times (- 10) \times 9 = 180 \times 9 [(-) \times (-) = +] = 1620$
Hence, $(- 18) \times (- 10) \times 9$ is $1620$ .