Use a simple method to divide 1400 by 200 to calculate and check.

1. Oral calculation: (6%)145+65 = 560-32 =142+24+76 = 0 ÷ 27 = 250× 4 =1-0.85 = 78.6×/. 1.25+= 24 billion+1300 million = 5.2 yuan -3.7 yuan = 2. Fill in the blanks: (14%) (0.5 points per blank) 1. In daily life, the most commonly used counting method is _ _ _ _ _. 2. Wang Qiong's skipping scores for three times were 58, 64 and 70 respectively, and the average score for three times was _ _ _ _. 3.1907800 = _ _ _ _ _ 4456209000 = _ _ _ _ _ 6308406700 pronounced: _ _ _ _ _ _ _ _ _ _. 4. Enlarging 0.78 by 1000 times is _ _ _ _ _ _ _, and reducing it by _ _ _ times is 7.8. 5.7 centimeters is one meter, and the decimal means _ _ _ _ _ _ _ meters. 6. Decimal simplification: All triangles with an angle of 5.300 = _ _ _ _ _ _ _ 0.820 = _ _ _ _ _ _ 7.45o are _ _ _ _ _ _ _ _ _. 8.125× 82 =125× ()+125× 2, the law of _ _ _ _ _ _ _ _ 9. The second digit to the right of the decimal point is _ _ _ _ _ _ _, and the counting unit is _ _ _ _ _ _.10. Rewrite the following name: 5.03km = _ _ _ _ _ m6089cm2 = _ _ _ _ _ square decimeter 6m56cm = _ _ _ _ m2kg500g. 1. Comparative size: 5.909 ○ 5.910 96.847 ○ 96.787 89.847 ○ 98.987 III. Multiple choice questions: (5%) 1. 2 in the unit is 2 () in the percentile. A. 10 times B. 100 times C. 1000 times 2. The height of three floors is about 10 times (). A.km.b.m.c decimeter 3. It is impossible to spell the angle of () with two triangles. a . 105 ob . 12oc . 145 O4。 Decimal 89.099 is accurate to 1% (). 89.09b.89. 1。 The following three degrees cannot be the angles () of the three internal angles of a triangle. A. 105o，45o，40o B.80o，70o，30o C.90o，83o，7o IV。 Judgment (5%) 1. The smallest natural number is 1. () 2.24 can only be divisible by 2, 4, 6 and 8. The time for the earth to rotate once is called one year. () 4. A set of quadrangles with parallel opposite sides is a trapezoid. () 5. At least two angles of each triangle are acute angles. () V. Calculation: (28%) 1. Column vertical calculation and checking calculation: (4%) 38.17+4.083 = 6.7-2.81= checking calculation: 2. Calculate the following problems with decimals: (6%) 5 kg 70 g+4 kg 7 g 56 km 800 m-8 800 m 3. Simple operation: Formulated calculation of kloc-0/+3 13 6538: (12%) 1, what is the quotient of the sum of 89 and 66 divided by the difference between 54 and 49? 2. One acute angle of a right triangle is 53o. What is the other acute angle? 3. The vertex angle of isosceles triangle is 144o. What are its two bottom corners? 7. Operation problem: (6%) Make the height of the bottom of the right isosceles triangle so that the parallel lines of one waist are too vertical. 8. Application question: (24%) 1, one pen 5.6 yuan, one box per 10, the school bought 20 boxes, how much did it cost? 2. Students in four classes of Grade Five and Grade Four donate books to children in poor mountainous areas. In the fifth grade, each class donated 264 books on average, and in the fourth grade, each class donated 236 books on average. How many books did two grades donate? This year is the harvest year of litchi. Orchard A harvested 550,000 tons of litchi, while orchard B harvested 360,000 tons less than orchard A. How many tons did the two orchards harvest? 4. 1 kg orange squeezed into 0.6 kg orange juice, 1 ton squeezed into how many kg orange juice? What about 500 grams of oranges?