For the addition part, what you need to do is properly align the decimal numbers and then carry out the addition:
1. Result of 2.712+(-1.72)=0.992
2. Result of -2.13+51.3=49.17
3. Result of -2.32+(-0.3)=-2.62
In the subtraction part:
1. Result of 2.75-10.76 = -8.01
2. Result of -0.29 - (-1.9) = -0.29 + 1.9 = 1.61.
In the multiplication part:
1. Result of (-2.7)(-1.7)=as a general rule, the product of two negative numbers is a positive number. And you multiply with decimals the same as if they were integers. But you must first perform multiplication ignoring the decimal places and then count how many digits are after decimal places in the question and put the same amount of digits after decimal places in the answer. After disregarding the decimals in the numbers during mathematical operations, (-2.7)(-1.7) will be regarded as a multiplication operation for -27 and -17, and the net result is 459. Now, you need to put the decimal places of both numbers together, exactly 2 decimal places(A single number taking a unit from each number has a single decimal place.). The final output will be 4.59.
2. Result of 8.24 - (-1.3) = the fact that there's a negative before a negative, implies taking a negative and adding it to a following negative, so it is - 8.14 + 1.3, and it equals -9.94
And to solve the Divisions:
1. Result of 90/18/9 = division always goes from left to right overtime. Therefore, to start with, 90/18 equals 5, then the 5/9 equals 0.556.
2. Result of -2.55 / 0.5 = In here again, the divisor is 0.5 in place of 2 which will result in a number of exactly Two times as big. If -2.55 is divided by 0.5 again, a counting operation for dividing -25.5/5 and total result is -5.1 exactly.
Answers & Comments
Answer:
【Answer】:
1. 0.992
2. 49.17
3. -2.62
4. -9.01
5. 1.61
6. -9.94
7. 2
8. 5.1
【Explanation】:
For the addition part, what you need to do is properly align the decimal numbers and then carry out the addition:
1. Result of 2.712+(-1.72)=0.992
2. Result of -2.13+51.3=49.17
3. Result of -2.32+(-0.3)=-2.62
In the subtraction part:
1. Result of 2.75-10.76 = -8.01
2. Result of -0.29 - (-1.9) = -0.29 + 1.9 = 1.61.
In the multiplication part:
1. Result of (-2.7)(-1.7)=as a general rule, the product of two negative numbers is a positive number. And you multiply with decimals the same as if they were integers. But you must first perform multiplication ignoring the decimal places and then count how many digits are after decimal places in the question and put the same amount of digits after decimal places in the answer. After disregarding the decimals in the numbers during mathematical operations, (-2.7)(-1.7) will be regarded as a multiplication operation for -27 and -17, and the net result is 459. Now, you need to put the decimal places of both numbers together, exactly 2 decimal places(A single number taking a unit from each number has a single decimal place.). The final output will be 4.59.
2. Result of 8.24 - (-1.3) = the fact that there's a negative before a negative, implies taking a negative and adding it to a following negative, so it is - 8.14 + 1.3, and it equals -9.94
And to solve the Divisions:
1. Result of 90/18/9 = division always goes from left to right overtime. Therefore, to start with, 90/18 equals 5, then the 5/9 equals 0.556.
2. Result of -2.55 / 0.5 = In here again, the divisor is 0.5 in place of 2 which will result in a number of exactly Two times as big. If -2.55 is divided by 0.5 again, a counting operation for dividing -25.5/5 and total result is -5.1 exactly.
that is the result of these operations.