A room needs 208 pieces of square bricks with a side length of 0.3 meters. If you use square bricks with a side length of 0.4 meters, how many pieces do you need Use proportion

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• 1. A house, with an area of 36 square decimeters of square paving need 120 fast, if you switch to 4 decimeters of square brick paving, how many pieces do you need?
• 2. A living room, if the area is 9 square decimeters of square paving need 144, if the area is 16 square decimeters of paving, how many?
• 3. A house, with an area of 18 square meters of brick floor, need 192. If the side length of 4 decimeters of brick, need how many?
• 4. 140 tiles with an area of 36 square decimeters are just finished. How many tiles do you need if you switch to a 3-decimeter-long tile
• 5. If the same brick is used to pave the floor, 9600 pieces of square bricks with a side length of 0.3 decimeters are needed; if the square bricks with a side length of 0.4 decimeters are used, how many pieces are needed?
• 6. If a room is paved with 30 cm long square bricks, 800 pieces are needed. If a room is paved with 50 cm long square bricks, how many pieces are needed? (solve by proportion)
• 7. The room is 60 decimeters long and 45 decimeters wide. Now we plan to use square bricks to pave the floor. We need to use the largest square brick on the side (how many pieces can we just fill the floor of the room
• 8. It takes 1000 pieces to use 12 cm long square bricks to pave the floor of a room. If you use 18 cm long square bricks to pave the floor, how many pieces do you need? (keep the number in integer)
• 9. The floor of a room needs 500 pieces of square bricks with a side length of 4 decimeters. If the floor is paved with square bricks with a side length of 5 decimeters, how many pieces do you need
• 10. It takes 500 pieces to use 15cm square bricks to pave the floor of a room. If we use 30cm square bricks to pave the floor, how many pieces?
• 11. Lingling's family has a room 4 meters long and 3.5 meters wide. How many square bricks do you need to use to pave the floor?
• 12. Xiaoqiang's house has a room 4 meters long and 3.5 meters wide. If it is paved with 50 cm long square bricks, how many pieces do you need?
• 13. Xiaoxiaojia has a room 5 meters long and 3.9 meters wide, which is paved with 0.5 meters square bricks. How many square bricks should I buy at least?
• 14. There is a room 4.8 meters long and 3.6 meters wide, which is paved with 0.3 meters long tiles, at least a few?
• 15. If a room is paved with 4-decimeter-long blocks, 175 blocks are needed. If it is paved with 5-decimeter-long blocks, how many blocks are needed? (use equation solution)
• 16. A room is 8.1m long and 5.2m wide. Now we need to lay 0.6m square floor tiles. Is 100 pieces enough? (regardless of loss.)
• 17. A room is 8.1 meters long and 5.2 meters wide. Now we need to lay a square floor tile with the edge of 0.6 meters. Is 100 pieces enough? (regardless of the loss). We need to estimate it first and then calculate it
• 18. Xiaoming's bedroom is 3.2 meters long and 2.5 meters wide. Now we need to lay 0.3 meters long square floor tiles. Is 100 pieces enough (regardless of loss) Can we not use symbols to express urgency directly!
• 19. A room is 8.1m long and 5.2m wide. Now we need to lay 0.6m square floor tiles. Is 100 pieces enough? (regardless of loss.)
• 20. A room is 8.1m long and 5.2m wide. Now we need to lay 0.6m square floor tiles. Is 100 pieces enough? (regardless of loss.)