论文部分内容阅读
第一周代数式及代数式的值 一、填空题 1.用代数式表示:(1)x的70％与它的平方的和是___;(2)a与b的平方和除a与b的积的2倍是___ 2.甲数比乙数的5倍多3,若甲数用x表示,则乙数可表示为___. 3.a件大衣降价10％后的价格是b元,则每件大衣的原价是___. 4.已知x+2y=5,那么2x+5+4y=___. 5.当a=4,b=3时,“a的2倍与b的和的50％,再除以a与b的差的一半的商”的值是___. 6.一个笼内鸡和兔共有m只脚,其中有a只兔子,
First week algebraic equations and algebraic equations 1. Fill in the blank question 1. Use algebraic expressions: (1) The sum of 70% of x and its square is ___; (2) The sum of squares of a and b divided by the product of a and b 2 times is ___ 2. A is more than 5 times as much as B. If A is represented by x, then B can be expressed as ___. 3.a The price after a coat is reduced by 10% is b, The original price of each coat is ___. 4. Known x+2y=5, then 2x+5+4y=___. 5. When a=4, b=3, "2 times the sum of a and b The value of 50%, divided by half the difference between a and b, is ___. 6. A chicken and rabbit in a cage has a total of m feet, including a rabbit.