### Home > CAAC > Chapter 2 > Lesson 2.1.4 > Problem2-43

2-43.

Without a calculator, compute the value of each expression below.

1. $−3+6$

Use the Commutative Property of Addition and your understanding of minus signs to make this a subtraction problem.

1. $(−2)(−9)$

When you multiply two numbers with the same sign, you will always get a positive result.

1. $−4−9−11$

Change the subtraction into an addition

1. $−12−18$

$−30$

1. $\frac{3}{4}(−8)$

Simplify before multiplying

1. $(−2)(−2)(2)$

Multiply from left to right, finding the correct sign for each step before moving on.

1. $7+(−19)$

$−12$

1. $−15\div15$

Division uses the same rules
for signs as multiplication.