1. Calculation: 1,1765+294 = 2,4000-1397 = 3,287× 4 = 4,100 ÷/kloc- After he took out two-thirds of them for the whole class, there was _ _ _ _ _ _ _ _? A, 60 B, 80 C, 100 D, 1203, which of the following is not a multiple of 8? A, 56 B, 64 C, 72 D, 764, which of the following is an important part of a computer? A, screen B, box C, mouse D, printer 5, which of the following operations is to open a new document in Excel? a，Ctrl+C B，Ctrl+V C，Ctrl+O D，Ctrl+S III。 Fill in the blank: 1, 3,756 gross written as _ _ _ _ _ _ _. 2. Fill four bags with 3000 grams of potato chips, each bag contains as many potato chips, and the weight of a single bag of potato chips is _ _ _ _ _ _. 3. The length of the rectangle is12cm, the width is 6cm, and the circumference is _ _ _ _ _ _ _ cm. 4、 16×7=________。 5、89+98=________。 True or false: multiples of 1 and multiples of 7 plus 8 must be multiples of 15. √ ×2. The numerator of the fraction is 5 and the denominator is 6. This score is less than 1/2. √ ×3. Xiaoming is now 16 years old and will be 20 years old in four years. √ ×4. In summer, the interval between every two slides must be 10 minute. √ ×5. A circle can have multiple diameters. √× Answer: 1. Calculation: 1, 20592,26033, 1 1484,105,4046,3447,728,9329,9810,6550. 7503,364, 1 125, 187 four. True or false: 1, × (for example, 7+8= 15 is not a multiple of 15) 2, √3, √4.