Find the value of $-7+9.1$−7+9.1.
Find the value of $4-6.1$4−6.1.
Find $-6\times0.8$−6×0.8, giving your answer as a decimal.
Find the value of $-2+1.9+7.3$−2+1.9+7.3.
Solve multi-step real-world and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate. Assess the reasonableness of answers using mental computation and estimation strategies.