Find the value of $-7+9.1$−7+9.1.
Find the value of $4-6.1$4−6.1.
Find $-6\cdot0.8$−6·0.8, giving your answer as a decimal.
Find the value of $-2+1.9+7.3$−2+1.9+7.3.
Solve mathematical problems using multi-step order of operations with rational numbers including grouping symbols, whole-number exponents and absolute value.