Add, Subtract, Multiply rational numbers

-5.7 + 0.9

• 2.1
• -4.8
• -8.3
• -10.7

-4/5 + (-3/4)

• -1 and 11/20

• 1 and 11/20

• -7/9

• 7/9

Solve. Rules:

Same sign: add and keep

Different signs: subtract and keep the sign of the bigger number

Solve. Rules:

Same sign: add and keep the sign

Different signs: subtract and keep the sign of the bigger number

(-5)(-6)(7.5)=

(-4)(-3)(-2)(-4)=