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Hướng dẫn giải bài tập SGK Toán lớp 4 trang 118: Luyện tập chung

Thứ năm - 07/12/2017 08:17
Hướng dẫn giải bài tập SGK Toán lớp 4 trang 118: Luyện tập chung
BÀI 1. (Hướng dẫn giải bài tập số 1 trang 118/SGK Toán 4)
Rút gọn các phân số:

Hướng dẫn giải:
Ta có:


BÀI 2. (Hướng dẫn giải bài tập số 2 trang 118/SGK Toán 4)
Trong các phân số đã cho dưới đây, phân số nào bằng 2/9

Hướng dẫn giải:


BÀI 3. (Hướng dẫn giải bài tập số 3 trang 118/SGK Toán 4)
Quy đồng mẫu số các phân số:


Hướng dẫn giải:


BÀI 4. (Hướng dẫn giải bài tập số 4 trang 118/SGK Toán 4)
Nhóm nào dưới đây có số ngôi sao đã tô màu bằng 2/3

Hướng dẫn giải:
Nhóm b là nhóm có số ngôi sau được tô màu đúng theo yêu cầu của đề bài.

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