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bài 1:a) Chiều dài thửa ruộng đó là:
60:3x5=100(m)
Diện tích thửa ruộng đó là:
100x60=6000(m2)
b) TRên thửa truộng đó người ta thu hoạch được:
6000:100x30=1800 kg=18 tạ ngô
Mik làm từng bài 1
Bài 2:
300 ki-lo-met gap 100 ki-lo-met so lan la :
300:100=3(lan)
neu o to do di quang duong 300 ki-lo-met thi tieu thu het so lit xang la :
13x3=39(l)
dap so : 39 l
Đổi : 5 tấn 86 kg = 5086 kg
7 tạ 60 kg = 760 kg
Ngày thứ 2 bán là:
760 x 3 = 2280 (kg)
Ngày thứ 3 bán là:
5086 - 760 - 2280 = 2046 (kg)
Đáp số : 2046 kg
Đổi:2 tấn=2000 kg
Ngày thứ hai bán được:
400 x 3/5=240(kg đường)
Của hàng còn lại:
2000-400-240=1360(kg đường)
Đáp số:1360 kg đường.
Ngày thứ nhất bán được số kg đường là:
235,5x3/10=70,65kg
Sau ngày thứ nhất còn số kg đường là:
235,5-70,65=164,85kg
Ngày thứ 2 bán được là:
164.85x7/10=115,395kg
Sau 2 ngày cửa hàng còn lại số kg đường là:
164,85-115,395=49,455kg
Vậy sau 2 ngày cửa hàng đó còn 49,455 kg đường
tick mình nha
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bạn có chơi free fire ko kết bạn với mình tên nick mình là : HaiDz87
Giải:
6 tạ = 600 kg
Ngày thứ nhất bán được là:
600 : 3 x 1 = 200 ( kg )
Ngày thứ hai bán được là:
600 : 5 x 3 = 360 ( kg )
Sau hai ngày cửa hàng còn lại là:
600 - 200 - 360 = 40 ( kg )
Đáp số: 40 kg gạo.
Bài 1: Viết số thích hợp vào chỗ chấm:
21 yến= 210kg 320 kg= 32yến 3 kg 5 g= 3005g
130 tạ= 1,3kg 4600 kg= 46tạ 3 kg125g= 3125g
44 tấn= 44000kg 19000 kg= 19tấn 1256g= 1kg256g
Bài 2: Một cửa hàng có 2 tấn đường. Ngày đầu bán 400 kg.Ngày thứ hai bán số đường = \(\frac{3}{5}\) ngày đầu. Hỏi cửa hàng còn lại bao nhiêu kg đường?
Giải:
2 tấn = 2000kg
Ngày thứ hai bán được là :
400 x \(\frac{3}{5}\) = 240 ( kg )
Cửa hàng còn lại số ki-lô-gam đường là :
2000 – 400 – 240 = 1360 ( kg )
Đ/s : 1360kg đường.
Bài 3: 12 người làm xong 1 công việc trong 4 ngày. Bổ sung thêm 4 người. Hỏi số người đó làm xong công việc trong baonhiêu ngày?
Giải:
Sau khi bổ sung số người làm công việc đó là :
12 + 4 = 16 ( người )
Tóm tắt :
12 người : 4 ngày
16 người : … ngày?
Làm xong công việc trong 1 ngày cần số người là :
12 x 4 = 48 ( người )
16 người làm xong công việc trong số ngày là :
48 : 16 = 3 ( ngày )
Đ/s : 3 ngày.
Bài 4: Một ô tô đi 100 km hết 12 lít xăng. Hỏi Đi 200 km hết bao nhiêu lít xăng? Đi 50 km hết bao nhiêu lít xăng?
Giải:
- Tóm tắt :
100km : 12 lít
200km : …lít?
Đi 200km hết số lít xăng là :
12 x 200 : 100 = 24 ( lít )
Đ/s : 24 lít.
- Tóm tắt :
100km : 12 lít
50km : …lít?
Đi 50km hết số lít xăng là :
12 x 50 : 100 = 6 ( lít )
Đ/s : 6 lít.
có t i ch