Giải Vở bài tập Toán 3 bài 62: Luyện tập

Thứ tư - 21/08/2019 09:47
Giải Vở bài tập Toán 3 bài 62: Luyện tập
1. Tính nhẩm:
9 x 1 = 9
1 x 9 = 9		 9 x 2 = 18
2 x 9 = 18		 9 x 3 = 27
3 x 9 = 27		 9 x 4 = 36
4 x 9 = 36
9 x 5 = 45
5 x 9 = 45		 9 x 6 = 54
6 x 9 = 54		 9 x 7 = 63
7 x 9 = 63		 9 x 8 = 72
8 x 9 = 72

2. Tính:
a) 9 x 4 + 9 = 36 + 9
                   = 45
b) 9 x 6 + 9 = 54 + 9
                   = 63
c) 9 x 5 + 9 = 45+ 9      
                   = 54  
d) 9 x 7 + 9 = 63+ 9
                   = 72
3. Lớp 3E có 4 tổ. Tổ Một có 8 bạn, 3 tổ còn lại mỗi tổ có 9 bạn. Hỏi lớp 3E có bao nhiêu bạn ?
Tóm tắt:
giai VBt toan lop 3 bai 62 cau 3
Bài Giải:
Số bạn có trong 3 tổ còn lại là:
9 x 3 = 27 (bạn)
Số bạn có trong lớp 3E là:
8 + 27 = 35 (bạn)
Đáp số: 35 bạn

4. Viết kết quả phép nhân vào ô trống (theo mẫu):
x 1 4 7 2 6 8 9 3 5 10
7 7 28 49 14 42 56 63 21 35 70
8 8 32 56 16 48 64 72 24 40 80
9 9 36 63 18 50 72 81 27 45 90
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