Diện tích hình thoi bằng tích của độ dài hai đường chéo chia cho 2 (cùng đơn vị đo).

Đất khách quê người

a

a

186

quy đồng mẫu số các phân số : 13/12,5/6.4/5
                                                    9/8,7/24,41/48

tính 18x5x11/10x9x22
       40x6x35/55x8x12x7

III. Order the words to make right sentence.

1. you/ What / at / did /zoo/? /see/the

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2. some/I/nice/pandas/peacocks/and/./saw

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3. pythons/did/the/were/do/you/What/there/?/when

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4. and/They/./quietly/they/moved/slowly/ate

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   5. usually / her / She / mother / helps / . / school / after

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