A rectangular reservoir, 6 meters long and 3 meters wide, is paved with floor tiles with an area of 9 square decimeters at the bottom of the reservoir. How many such floor tiles do you need?

9 square decimeter = 0.09 square meter, 6 × 3 △ 0.09, = 18 △ 0.09, = 200 (pieces), a: 200 such floor tiles are needed

A small shop is 7 meters long and 3 meters wide. How many square meters is the area? How many square decimeters is the total area? Buy 90 pieces of 5 decimeters long floor tiles to lay the floor of this shop. It's enough
I've read it, but I don't understand it. =, = I've done it, but I don't understand it. =, = I've asked a kind person for help

How many square meters is a small shop 7 meters long and 3 meters wide?
7 × 3 = 21 (M2)
How many square decimeters?
21 square meters = 2100 square decimeters
Buy 90 pieces of 5-decimeter-long floor tiles to lay the floor of this shop. It's enough
What is the area of each block
5 × 5 = 25 (square decimeter)
What's the area of 90
25 × 90 = 2250 (square decimeter)
Because 2250 > 2100
So enough

The area of a cuboid flower bed is 6 square meters. If the length is increased by 13 and the width is increased by 14, how many square meters will the area increase now?

Area of rectangle ①: B × 14a = 14ab = 14 × 6 = 1.5 (square meters); area of rectangle ②: 13b × 14a = 112AB = 112 × 6 = 0.5 (square meters); area of rectangle ③: a × 13b = 13ab = 13 × 6 = 2 (square meters); increased area: 1.5 + 0.5 + 2 = 4 (square meters); answer: the current area is increased by 4 square meters

A rectangular plot, 30 meters long and 20 meters wide, with 5 / 12 of this plot, what is the area for growing Chinese cabbage?

30×20×5/12
=600×5/12
=250 (square meters) a: Chinese cabbage

There is a rectangular vegetable field, which is 2 meters long and 3 / 5 of its width. How many square meters is the area of cabbage with 3 / 5 kinds of cabbage?

2X(2x3/5)x3/5
=36/25
=1.44 (M2)

My family has a rectangular cabbage field, 10 meters long and 2 meters wide. What's the area of this rectangular field? If you collect 3 kilograms of cabbage per square meter, it's a good place
How many kilos of cabbage can I take in all

10 × 2 = 20 (m)
20 × 3 = 60 (kg)
A: it covers an area of 20 meters and can collect 60 kilograms of cabbage

A rectangular lawn is 15 meters long and 12 meters wide. Now increase the length and width of the rectangular lawn by 1 / 3 respectively. Increase the area of the rectangular lawn

Area increase = 15 × (1 + 1 / 3) × 12 × (1 + 1 / 3) - 15 × 12 = 180 square meters

Increase the length and width of a rectangle by one third respectively. What is the area of the rectangle now?

If you don't understand, ask me again. If you copy the wrong question, please let me know

A rectangle is 15 decimeters long and 12 decimeters wide. If its length and width are reduced by one third, how many square decimeters will its area be reduced?

15*12=180
15*2/3*12*2/3=80
180-80=100

Draw a rectangle at will, and then increase the length and width of the rectangle by 1 / 2 respectively?

The area of the current rectangle is 2.25 times that of the original rectangle, nine fourths

A rectangular reservoir, 6 meters long and 3 meters wide, is paved with floor tiles with an area of 9 square decimeters at the bottom of the reservoir. How many such floor tiles do you need?