Khoảng cách giữa 2 số hạng trong tổng trên là `6` đơn vị.
Tổng trên có số số hạng là :
`(90-6) :6 +1 = 15` (số hạng)
Tổng :
`(6+90) × 15 : 2= 720`
Đáp số : `720`
Đáp án:
Giải thích các bước giải:
Ta có Khoảng cách giữa 2 số hhangj liên ttieeps là 6
Số số hạng của tổng là
(90-6):6+1=15(số hạng)
Tổng có giá trị là
(6+90)×15:2=720
Vậy 6 + 12 + 18 + .......+ 90=720
Xin ctlhn
Giúp mik vs mn sợ sai nên cần mn giúp :<<
Exercise 1: Rewrite the following sentences in reported speech. 1. "Do you like my new clothes?" she asked her friend. -> She asked her friend ________________________________ 2. "Where are my keys?" he asked his wife. -> He asked his wife _____________________________________ 3. "Who is your favourite singer?" Mike asked me. -> Mike asked me ______________________________________ 4. "Where were you?" She asked him. -> She asked him ______________________________________ 5. "Can you pick me up after school?" she asked her mother. -> She asked her mother ________________________________ 6. "Have you seen Kim?" David asked Sarah. -> David asked Sarah __________________________________ 7. "We will have a housewarming party next week," said Mike and Helen. -> Mike and Helen _____________________________________ 8. "Julia and Jose might move to Australia next year," Rory said to us. -> Rory told us _______________________________________ 9. Nam said “I am told to be at school before 7 o’clock” -> Nam said __________________________________________ 10. Thu said “All the students will have a meeting next week” -> Thu said _________________________________________ Exercise 2: Use one of the options to complete the sentences in the reported speech. 1. On Monday: “We will set off tomorrow.” A week later: They said they would set off ……………………………………… a) tomorrow b) the next day 2. In the morning: “I’m going to meet Greg tomorrow.” In the evening: Marion said she was going to meet Greg ……………………….. a) tomorrow b) the following day 3. “I don’t want to put this shelf here.” Mark told me in the bedroom he didn’t want to put …………………………… a) that shelf there b) this shelf there 4. On 1 June: “I invited him last week.” On 10 June: She told me that she had invited him ……………………………… a) the previous week b) last week 5. On Thursday: “We went to see our grandma last week.” On Friday: They said they had gone to see their grandma ……………………… a) the previous week b) last week 6. At school: “We are writing a test today.” After school: Jim told me they were writing a test ……………………………… a) today b) that day 7. “I will resign next week.” Last Friday Tina announced that she would resign …………………………… a) the next week b) the week before
cali chữ: Hoàng Minh Hiếu NL: Cái này dành cho ai đó, chắc ng đó cx bt r ha. Mong mod, ad đừng xóa.
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