Multiply-i -5 -7ii -9 - 6iii 9 -4iv 8 -7v -124 -1vi -12 -7vii -63 -7viii -7 - 15

(i) nbsp; nbsp; nbsp; nbsp; nbsp; 5 #215; 7=35 (ii) nbsp; nbsp; nbsp; nbsp; 9 #215;6= 54 (iii) nbsp; nbsp; nbsp;9 #215; 4= 36 ( ...

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Byju's Answer

Standard VII

Mathematics

Multiplication of Integers

Multiply.i -5...

Question

Multiply.
(i) $(- 5) \times (- 7)$
(ii) $(- 9) \times (6)$
(iii) $(9) \times (- 4)$
(iv) $(8) \times (- 7)$
(v) $(- 124) \times (- 1)$
(vi) $(- 12) \times (- 7)$
(vii) $(- 63) \times (- 7)$
(viii) $(- 7) \times (15)$

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Solution

(i) $(- 5) \times (- 7) = 35$
(ii) $(- 9) \times (6) = - 54$
(iii) $(9) \times (- 4) = - 36$
(iv) $(8) \times (- 7) = - 56$
(v) $(- 124) \times (- 1) = 124$
(vi) $(- 12) \times (- 7) = 84$
(vii) $(- 63) \times (- 7) = 441$
(viii) $(- 7) \times (15) = - 105$

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Similar questions

Do these in your head:

(i) (12 × (−7)) + (8 × (−7))

(ii) (29 × (−2)) + (21 × (−2))

(iii)

(iv)

(v) (1.5 × (−9)) + (0.5 × (−9))

(vi) (3.4 × (−7)) + (0.6 × (−7))

(vii) (4 × (−0.19)) + (6 × (−0.19))

Verify each of the following :

(i) $\frac{3}{7} \times \frac{- 5}{9} = \frac{- 5}{9} \times \frac{3}{7}$

(ii) $\frac{- 8}{7} \times \frac{13}{9} = \frac{13}{9} \times \frac{- 8}{7}$

(iii) $\frac{- 12}{5} \times \frac{7}{- 36} = \frac{7}{- 36} \times \frac{- 12}{5}$

(iv) $- 8 \times \frac{- 13}{12} = \frac{- 13}{12} \times (- 8)$

Name the property of multiplication illustrated by each of the following statements :

(i) $\frac{- 15}{8} \times \frac{- 12}{7} = \frac{- 12}{7} \times \frac{- 15}{8}$

(ii) $(\frac{- 2}{3} \times \frac{7}{9}) \times \frac{- 9}{5} = \frac{- 2}{3} \times (\frac{7}{9} \times \frac{- 9}{5})$

(iii) $\frac{- 3}{4} \times (\frac{- 3}{4} \times \frac{- 5}{6}) + (\frac{- 3}{4} \times \frac{7}{8})$

(iv) $\frac{- 16}{9} \times 1 = 1 \times \frac{- 16}{9} = \frac{- 16}{9}$

(v) $\frac{- 11}{15} \times \frac{15}{- 11} = \frac{15}{- 11} \times \frac{- 11}{15} = 1$

(vi) $\frac{- 7}{5} \times 0 = 0$

Evaluate : $(i) \frac{5}{9} + \frac{- 7}{6} (i i) 4 + \frac{3}{- 5} (i i i) \frac{1}{- 15} + \frac{5}{- 12} (i v) \frac{5}{9} + \frac{3}{- 4} (v) \frac{- 8}{9} + \frac{- 5}{12} (v i) 0 + \frac{- 2}{7} (v i i) \frac{5}{- 11} + 0 (v i i i) 2 + \frac{- 3}{5} (i x) \frac{4}{- 9} + 1$

Multiply and reduce to lowest form (if possible):

(i) (ii) (iii)

(iv) (v) (vi)

(vii)

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Multiply. (i) -5×-7 (ii) -9×6 (iii) 9×-4 (iv) 8×-7 (v) -124×-1 (vi) -12×-7 (vii) -63×-7 (viii) -7×15

(i) -5×-7=35 (ii) -9×6=-54 (iii) 9×-4=-36 (iv) 8×-7=-56 (v) -124×-1=124 (vi) -12×-7=84 (vii) -63×-7=441 (viii) -7×15=-105

Multiply.
(i) $(- 5) \times (- 7)$
(ii) $(- 9) \times (6)$
(iii) $(9) \times (- 4)$
(iv) $(8) \times (- 7)$
(v) $(- 124) \times (- 1)$
(vi) $(- 12) \times (- 7)$
(vii) $(- 63) \times (- 7)$
(viii) $(- 7) \times (15)$

(i) $(- 5) \times (- 7) = 35$
(ii) $(- 9) \times (6) = - 54$
(iii) $(9) \times (- 4) = - 36$
(iv) $(8) \times (- 7) = - 56$
(v) $(- 124) \times (- 1) = 124$
(vi) $(- 12) \times (- 7) = 84$
(vii) $(- 63) \times (- 7) = 441$
(viii) $(- 7) \times (15) = - 105$