精品文档---下载后可任意编辑+ = 1 - = - ×100= + =÷÷×125= + =二、解方程
(1) x + = (2) - x= (3) 4x - =2- 三、选择合理的方法进行计算
(1)3 - - - ××0
17 (3) 10- - (4) + - + (5) 0
25+ + + (6)+ + 一.直接写出得数
×÷÷3=÷×4=56 +34 = 13 +14 = 1-25 = 310 -56 =23 +524 = 12 -23 = 415 +78 = 1-12 =二、解方程:Ⅹ-316 =29910 +Ⅹ=25 2Ⅹ-1720 =25三、用简便方法计算下面各题:920 +79 +16 1-49 -3429 +14 +56 +4916 -(29 -58 )18 +310 -110910 +(110 -25一.直接写出得数
37 +815 =47 +715 =2=310 -13 =4÷6=110 -514 =34 +0
2=914 -1=1-14 =14 +712 =34 +512 =512 +518 =2=712 -59 =4÷6=二、解方程:x+ =1 X- = x -(+)=三、用简便方法计算下面各题:3 - - - 10- - + - + 0
25+ + + 一、直接写出得数
(4 分)110 -120 = 2+12 = 14 +34 -15 = 79 -29 = 1-12 -15 = 15 +12 -15 = 13 +53 -2= 25 +110 = 二、解方程或比例
(9 分)①χ= 45 ②25 χ+35 χ=28 ③χ-45 =512三、计算,要写出主要计算过程,能用简便方法的要用简便方法计算
(18 分)15 +12 +1312 +13 -1415 +12 +45 2-512 -71297 +16 +56 +571315 -(1315 -