Question
Multiply 2.9 × 63.
- 172.7
- 181.7
- 182.7
- 182.8
Hint:
In decimal multiplication, first we have to add the number of digits after the decimal point in both the numbers for example, in the given question two numbers whose product is asked is 2.9 and 63 so the sum of the digits after the decimal point in both the numbers is 1 ( one in 2.9, i.e., 9 and zero in 63). Then we perform normal multiplication between 2.9 and 63 (ignoring the decimal point) and in the product that we get we need to put the decimal point after 1 digit( i.e., the sum of digits that we found at first) from right. And we will get our required answer.
The correct answer is: 182.7
Step by step solution:
Given two decimal numbers: 2.9 and 63
Now, we need to multiply the two decimal numbers
2.9
x 63
1827 (we got the product by ignoring the decimal point)
Now, we have to place the decimal point after 1 digit from the right, i.e., 182.7 which is the required product of the two numbers.
Thus, option (c) is the correct option.
Related Questions to study
Multiply 2.8 × 72.
Multiply 2.8 × 72.
Maria bought 3 pounds of ground beef for hamburgers. If the hamburger is sold for $4.19 a pound, calculate the money Maria spent.
Another approach to the question could be that we could add $4.19, i.e., the price per pound 3 (pounds of ground meat bought) times.
Thus, the total money spent by Maria = $4.19 +$4.19 + $4.19
= $ 12.57
Thus, option (a) is the correct option.
Maria bought 3 pounds of ground beef for hamburgers. If the hamburger is sold for $4.19 a pound, calculate the money Maria spent.
Another approach to the question could be that we could add $4.19, i.e., the price per pound 3 (pounds of ground meat bought) times.
Thus, the total money spent by Maria = $4.19 +$4.19 + $4.19
= $ 12.57
Thus, option (a) is the correct option.
Taylor earns $8.50 per hour as an auto mechanic. The total money Taylor will earn if she works 4.5 hours on Friday is
Another approach to the question could be that add $8.50, i.e., the money she earns per hour 4.5 times to get the total money she earns.
Therefore, total money she earns on Friday = $8.50 + $8.50 + $8.50 + $8.50 + $(8.50/2) [here er divide the last 8.50 by 2 because the number of hours she worked is 4.5, i.e., four and a half]
=$ 38.25
Taylor earns $8.50 per hour as an auto mechanic. The total money Taylor will earn if she works 4.5 hours on Friday is
Another approach to the question could be that add $8.50, i.e., the money she earns per hour 4.5 times to get the total money she earns.
Therefore, total money she earns on Friday = $8.50 + $8.50 + $8.50 + $8.50 + $(8.50/2) [here er divide the last 8.50 by 2 because the number of hours she worked is 4.5, i.e., four and a half]
=$ 38.25
$1.38 x 5.5=
$1.38 x 5.5=
6.97 x 2.3 =
6.97 x 2.3 =
5.7 x 0.9
5.7 x 0.9
Steve Rogers drinks 4.5 gallons of milk per day. Each bottle contains 16.5 fluid ounces. The fluid ounces of milk does he drink per day is
Another approach to the question could be that we add the amount of milk each bottle contains (fluid ounces) 4.5 times, i.e., the number of gallons of milk Steve drinks.
Thus fluid ounces of milk Steve drinks per day = 16.5 + 16.5 +16.5 +16.5 + (16.5/2) [here we divide the last 16.5 by 2 since it is given 4.5 ] = 74.25 fluid ounces .
Thus, option (b) is the correct option.
Steve Rogers drinks 4.5 gallons of milk per day. Each bottle contains 16.5 fluid ounces. The fluid ounces of milk does he drink per day is
Another approach to the question could be that we add the amount of milk each bottle contains (fluid ounces) 4.5 times, i.e., the number of gallons of milk Steve drinks.
Thus fluid ounces of milk Steve drinks per day = 16.5 + 16.5 +16.5 +16.5 + (16.5/2) [here we divide the last 16.5 by 2 since it is given 4.5 ] = 74.25 fluid ounces .
Thus, option (b) is the correct option.
A bag of grass seed weighs 5.8 pounds. Calculate the pounds 2.5 bags would weigh.
Another approach to the question could be that we could add 5.8 pounds, i.e., the weight of one bag 2.5 (number of bags to be weighed) times.
Thus, the weight of 2.5 bags = 5.8 + 5.8 + (5.8÷2) pounds
= 14.5 pounds
Hence, option (c) is the correct option.
A bag of grass seed weighs 5.8 pounds. Calculate the pounds 2.5 bags would weigh.
Another approach to the question could be that we could add 5.8 pounds, i.e., the weight of one bag 2.5 (number of bags to be weighed) times.
Thus, the weight of 2.5 bags = 5.8 + 5.8 + (5.8÷2) pounds
= 14.5 pounds
Hence, option (c) is the correct option.
