decamal
12.45 + 8.36
20.81
1/2 + 3/4
2/4 + 3/4 = 5/4 = 1 1/4
A rectangle has a length of 12 cm and a width of 5 cm. What is its area?
Rectangle area:
Area = length × width
= 12 × 5 = 60 cm²
84 ÷ 7 =
12
125 × 48
6,000
25.6 − 9.78
15.82
5/6 − 1/3
5/6 − 2/6 = 3/6 = 1/2
A triangle has a base of 10 m and a height of 6 m.
👉 What is its area?
Area = ½ × base × height
= ½ × 10 × 6 = 30 m²
156 ÷ 12
13
36 × 27 =127 true or false
no 972
3.25 × 4.2
13.65
2/5 × 3/4
6/20 = 3/10
A square has a perimeter of 24 cm.
👉 What is the length of one side?
Square side length:
Perimeter = 4 × side
24 = 4 × side → side = 6 cm ✅
9.6 ÷ 0.8
12
14.6 × 3.75
54.75
18.9 ÷ 0.3
63
A pizza was cut into 8 equal slices. Mia ate 3/8 of it, and her friend ate 1/4.How much of the pizza did they eat together?
Mia ate 3/8, her friend ate 1/4 (which is 2/8).
3/8 + 2/8 = 5/8
👉 What is the length of one side? A circle has a radius of 7 cm
Circumference = 2 × π × r
= 2 × 3.14 × 7 = 43.96 cm ✅
42.5 ÷ 5
8.5
0.84 × 7.3
6.132
7.368 rounded to the nearest hundredth
7.37
A runner completed 2/3 of a race in the morning and 1/6 in the afternoon.
What fraction of the race does the runner still need to finish?
Morning: 2/3, Afternoon: 1/6
Find a common denominator → 2/3 = 4/6
4/6 + 1/6 = 5/6
The runner finished 5/6, so they still need to run:
1 − 5/6 = 1/6
The runner still needs to finish 1/6 of the race.
A cube has edges that are 4 cm long.
👉 What is its volume?
Cube volume:
Volume = side³
= 4³ = 64 cm³ ✅
63 ÷ 0.3
210
123.5 × 4.2
518.7