Giải Vở bài tập Toán 3 bài 109: Luyện tập
Giải Vở bài tập Toán 3 bài 109: Luyện tập
1. Đặt tính rồi tính:
2. Có hai bể nước, mỗi bể có 2450
nước. Người ta đã dùng hết 3500
nước ở hai bể đó. Hỏi trong cả hai bể còn bao nhiêu lít nước ?
Tóm tắt:
Giải:
Số lít nước có trong cả hai bể là:
2450 x 2 = 4900 (lít)
Số lít nước còn lại trong cả hai bể là:
4900 – 3500 = 1400 (lít)
Đáp số: 1400 (lít)
3. Tìm x?
a. x : 5 = 1308
x = 1308 x 5
x = 6540
b. x : 6 = 1507
x = 1507 x 6
x = 9042
4. Cho A và B trong đó có một số ô vuông đã tô màu:
- Hình A có 7 ô vuông tô màu
- Tô thêm 2 ô vuông để được hình có 9 ô vuông.
- Hình B có 9 ô vuông tô màu
- Tô thêm 3 ô vuông để được hình có 12 ô vuông.
2. Có hai bể nước, mỗi bể có 2450
nước. Người ta đã dùng hết 3500 nước ở hai bể đó. Hỏi trong cả hai bể còn bao nhiêu lít nước ? Tóm tắt:
Giải:
Số lít nước có trong cả hai bể là:
2450 x 2 = 4900 (lít)
Số lít nước còn lại trong cả hai bể là:
4900 – 3500 = 1400 (lít)
Đáp số: 1400 (lít)
3. Tìm x?
a. x : 5 = 1308
x = 1308 x 5
x = 6540
b. x : 6 = 1507
x = 1507 x 6
x = 9042
4. Cho A và B trong đó có một số ô vuông đã tô màu:
- Hình A có 7 ô vuông tô màu
- Tô thêm 2 ô vuông để được hình có 9 ô vuông.
- Hình B có 9 ô vuông tô màu
- Tô thêm 3 ô vuông để được hình có 12 ô vuông.
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