Adding Decimals
5.7 + 0.8
6.5
Find the area of a rectangle with a length of 12 cm and a width of 5 cm.
Answer: Area = length × width = 12 cm × 5 cm = 60 cm².
the total number of students in a class is 30. There are 10 girls and 20 boys
The ratio of girls:boys is 10:20 or 1:2.
2.7 − 0.1 =
2.6
-5 + (-3) = -8.
+-5 and -3 is 8
0.7 + 2.753 =
3.453
What is the area of a square with a side length of 8 cm?
Answer: Area = side × side = 8 cm × 8 cm = 64 cm².
: In a class, there are 12 boys and 18 girls. What is the ratio of boys to girls?
The ratio is 12:18, which simplifies to 2:3.
1000.25 - 89.90
910.35
12 - 7 = 12 + (-7) = 5
subtracting 5
6.4 + 1.559
7.959
Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).
Answer: Area = πr² ≈ 3.14 × (7 cm)² ≈ 3.14 × 49 cm² ≈ 153.86 cm².
A recipe calls for 3 cups of flour and 2 cups of sugar. What is the ratio of flour to the total amount of ingredients
The total amount of ingredients is 3 + 2 = 5 cups. The ratio of flour to the total amount of ingredients is 3:5.
295.67 - 50.92
244.75
subtracting 8
7.5 + 4.673
What is the area of a triangle with a base of 10 cm and a height of 6 cm?
Answer: Area = (1/2) × base × height = (1/2) × 10 cm × 6 cm = 30 cm².
The ratio of red to blue marbles in a bag is 4:7. If there are 28 red marbles, how many blue marbles are there?
Since 4 parts represent 28 red marbles, one part is 28 / 4 = 7. Therefore, the number of blue marbles is 7 * 7 = 49.
2 − 0.25 = ___
1.75
-5
9.95 + 8.374
18.324
A rectangular garden is 25 meters long and 15 meters wide. What is its area?
Answer: Area = length × width = 25 m × 15 m = 375 m².
The ratio of boys to girls in a class is 5:3. If there are 40 students in the class, how many are boys
The ratio indicates 5 + 3 = 8 parts in total. One part is 40 / 8 = 5 students. The number of boys is 5 * 5 = 25
100.01 - 0.011=
99.999
8 - 9 + (-40) - (-12) + 4 = 8 - 9 - 40 + 12 + 4
-25