Let's break down the expression step by step:
2.3/20−0.645÷0.32.3/20 - 0.645 ÷ 0.32.3/20−0.645÷0.3 First, perform inside the parentheses:= 0.115−2.150.115 - 2.150.115−2.15 = -2.035
8÷12.1/2−0.2+1/7×1.968 ÷ 12.1/2 - 0.2 + 1/7 × 1.968÷12.1/2−0.2+1/7×1.96 First, perform inside the parentheses:= 8÷6.05−0.2+0.288 ÷ 6.05 - 0.2 + 0.288÷6.05−0.2+0.28 = 1.32−0.2+0.281.32 - 0.2 + 0.281.32−0.2+0.28 = 1.4
Now we multiply the results of step 1 and step 2:-2.035 * 1.4 = -2.849
Therefore, the final result of the expression is -2.849.
Let's break down the expression step by step:
2.3/20−0.645÷0.32.3/20 - 0.645 ÷ 0.32.3/20−0.645÷0.3 First, perform inside the parentheses:
= 0.115−2.150.115 - 2.150.115−2.15 = -2.035
8÷12.1/2−0.2+1/7×1.968 ÷ 12.1/2 - 0.2 + 1/7 × 1.968÷12.1/2−0.2+1/7×1.96 First, perform inside the parentheses:
= 8÷6.05−0.2+0.288 ÷ 6.05 - 0.2 + 0.288÷6.05−0.2+0.28 = 1.32−0.2+0.281.32 - 0.2 + 0.281.32−0.2+0.28 = 1.4
Now we multiply the results of step 1 and step 2:
-2.035 * 1.4 = -2.849
Therefore, the final result of the expression is -2.849.