Selina solutions

Selina solutions

Grade 7

Integers | Exercise 1(A)

Question 1

Q1) Evaluate:

(i) 427\times8+2\times427

(ii) 394\times12+394\times\left(-2\right)

(iii) 558\times27+3\times558

Solution 1:

(i) 427\times8+2\times427

Using distributive property,

= 427\times\left(8+2\right)

= 427\times10

= 4270

(ii) 394\times12+394\times\left(-2\right)

Using distributive property,

= 394\times\left(12+\left(-2\right)\right)

= 394\times\left(12-2\right)

= 394\times10

= 3940

(iii) 558\times27+3\times558

Using distributive property,

= 558\times\left(27+3\right)

= 558\times30

= 16740

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subject-cta

Question 1

Q1) Evaluate:

(i) 427\times8+2\times427

(ii) 394\times12+394\times\left(-2\right)

(iii) 558\times27+3\times558

Solution 1:

(i) 427\times8+2\times427

Using distributive property,

= 427\times\left(8+2\right)

= 427\times10

= 4270

(ii) 394\times12+394\times\left(-2\right)

Using distributive property,

= 394\times\left(12+\left(-2\right)\right)

= 394\times\left(12-2\right)

= 394\times10

= 3940

(iii) 558\times27+3\times558

Using distributive property,

= 558\times\left(27+3\right)

= 558\times30

= 16740

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your mathematics exam ?

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Book a free class now
subject-cta
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