Hướng dẫn giải bài tập SGK Toán lớp 4 trang 20: Viết số tự nhiên trong hệ thập phân

Thứ ba - 21/11/2017 08:20
Hướng dẫn giải bài tập SGK Toán lớp 4 trang 20: Viết số tự nhiên trong hệ thập phân
BÀI 1. (Hướng dẫn giải bài tập số 1 trang 20/SGK Toán 4)
Viết theo mẫu:

Đáp án:


BÀI 2. (Hướng dẫn giải bài tập số 2 trang 20/SGK Toán 4)
Viết mỗi số sau thành tổng theo mẫu:
387; 873 ; 4738 ; 10 837.
Mẫu: 387 = 300 + 80 + 7.

Đáp án:
873 = 800 + 70 + 3
4738 = 4 000 + 700 + 30 + 8
10 837= 10 000 + 800 + 30 + 7

BÀI 3. (Hướng dẫn giải bài tập số 3 trang 20/SGK Toán 4)
Ghi giá trị của chữ số 5 trong mỗi số ở bảng sau (theo mẫu):

Đáp án:

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