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Chapter 1: Q. 1.91 (page 66)

Multiply:(a)-6.8(b)-4(-7)(c)9(-7)(d)5.12

Short Answer

Expert verified

The solutions of (a), (b), (c) and (d) are-48,28,-63and60

Step by step solution

01

Part (a) Step 1. Given information

Multiply:-6.8

02

Part (a) Step 2. Calculation

We have,

-6.8=-48

The signs are different so the product is negative.

03

Part (b) Step 1. Given information

Multiply:-4(-7)

04

Part (b) Step 2. Calculation

We have,

-4(-7)=28

The signs are same so the product is positive.

05

Part (c) Step 1. Given information

Multiply:9(-7)

06

Part (c) Step 2. Calculation

We have,

9(-7)=-63

The signs are different so the product is negative.

07

Part (d) Step 1. Given information

Multiply:5.12

08

Part (d) Step 2. Calculation

We have,

5.12=60

The signs are same so the product is positive.

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