(1) position? Statistics? Mathematical wide angle 1. What are the different origins? 0? 0? And then what? 1? 1? 1, expressed in pairs? Column? Okay？ 2. direction? Go first? Do it again. Column? Things? Okay？ North and South? East or north is Canada? It is decreasing from west to south. 3. Translation? Is it a north-south change? These columns remain unchanged. Is it the column that changed from east to west? This line remains the same. ? Peer to peer translation? 4. Axisymmetric? The distance between the left and right figures and the symmetry axis is equal. 2. What is the difference between statistics 1 and statistical charts 1? Bar chart? What is the quantity? ? 2? Broken line statistical chart? Indicate the trend of change. ? 3? Fan charts? Represents the relationship between part and total. 2. Fan leaderboard? 1? Calculate the central angle of 360? 2? Ask questions about *? Unit "1" III. Mathematical wide angle? Chicken and rabbit in the same cage? 1, hypothesis method? Set a chicken for the rabbit? Think of rabbits as chickens. Attention *? It is easy to answer that the number of feet of a chicken is the number of feet of a rabbit. 2. Equation? Attention *? Do you want to set the number of feet to x? To avoid negative reduction. ? Two? Calculate 1, which means 1, multiply? ① Fraction multiplied by integer? Find the sum of several identical addends. 2 Score times score? Find the fraction of a number. 2. organization? Know the product of two factors and one of them? The operation of finding another factor. 3. percentage? What percentage does a number account for in another book? Second, the rule 1, multiplication? Molecular reproduction produces molecules? Denominator multiplication as denominator? Can you provide more points? Recalculate 2. Organization? The number A divided by the number B equals the reciprocal of the number A divided by the number B? Except "0"? . 3. Division Number Division Number = Division Number = Division Number? Divider A ÷ B = one of B A=A:B(B≠0) IV. Variation law 1, multiplication? Original number × number less than 65438 +0? Original number? Original number × number greater than 1? Original number 2, division? Is the dividend greater than 1? Dividend? Dividend less than 1? Dividend five, reciprocal 1, definition? Two numbers whose product is 1 are reciprocal. 2. Did you find the number? 1? Scores? The numerator and denominator of a fraction are interchangeable. ? 2? Integer? A→ 1/A？ 0 has no countdown? The reciprocal of 1 is 1? . ? 3? Decimal? The percentage will be decimal first? Percentage? Into the simplest score? Find the countdown again. 3. Is the reciprocal of the true score greater than 1? Fake scores? Except 1? The reciprocal of is less than 1.