Câu số 24:Compare: 81kg ……….80200g Câu số 25: If A = 112 + 113 + 114 and B = 115 + 116 then A – B = …… Câu số 26 The 21st century starts in 2001. It ends in ………… Câu số 27: Which one the of the numbers does not belong in the following series? 2 – 4 – 7 – 8 – 9 – 13 – 17 – 25 A – thirty B – three C – seven D - eight Câu số 28: If x - (145 + 56) = 121 then x =………. Câu số 29: Calculate: 672g – 276g = ………g Câu số 30: Calculate: 8 × 5362 =…………… Câu số 31: The sum of two numbers is 76 and their difference is 22. The smaller number is……… A – 27 B – 53 C – 50 D – 49 Câu số 32: 3 hours 1/5 hour = ……………..minutes Câu số 33: A book store has 50 exercise books, 60 text books and 36 novels. The sum of books in the store is……….. 5 sao chỉ cần đáp án thanks