1 (计算题专项练习) 计算题训练一 1、解方程: 185 + x = 1211 2 x –91 = 98 3 x –1.4×2=1.1 x +32 –21 =1817 5.5 x –3 x = 1.75 x +53 = 107 85 x = 40 x ÷32 = 65 x –43 x = 81 x +72 x = 18 计算题训练二 1、解方程: 2512 x = 15×53 x ×(61 +83 )= 1213 x ×(1+41 )= 25 (1–95 ) x = 158 2 x ×54 ×81 = 10 x ×32 = 8×43 x ×72 = 218 15÷ x = 65 计算题训练三 1、解方程: x ×43 ×52 = 18 x ×109 = 24×81 x ×31 ×53 = 4 x ×72 = 18×31 3x = 10 7 x –4 x = 21 x +41 x = 20 41 × x +51 ×45 = 12 计算题训练四 计算下面各题: [1–(41 +83 )]÷81 91 –125 ×54 ÷3 3 (1–61 ×52 )÷97 71 ÷32 ×7 1211–(91 +125 ) 254 ×43 –501 25÷(87 –65 ) 158 +32 –43 (65 –43 )÷(32 +94 ) [1–(41 +52 )]÷3.5 计算题训练五 计算下面各题: [(1–53 )×32 ]÷4 83 +31 +41 51 ×[31 ÷(21 +65 )] 12÷(1–73 ) 4 [(1–61 ×52 )÷97 [(1–53 )×52 ]÷4 8–74 ÷32 ×61 54 ×32 –61 ÷21 (65 –43 )÷92 (21 +31 )÷(1–83 ) 计算题训练六 用简便方法计算: 51 ÷3+54 ×31 94 +72 +185 ÷21 72×(21 –31 +41 ) 2–32 ÷54 –61 98 +76 ×32 +73 83 +54 ×65 +31 71 ×116 +115 ÷7 4–158 ÷32 –51 5 计算题训练七 用简便方法计算: 98×(9+43 )–32 87 ÷32 +87 ×21 54 +85÷41 +21 2–98×43 –31 30×(61 +52 –21 ) 87 +32 ÷54 +61 6–125 ×109 –813 134 ×51+139 ÷5 计算题训练八 用简便方法计算: 12×(21 –31+41 ) 51+94 ×83+65 4–52 ÷158 –41 48×(31 –21 +41 ) 256 ÷9+256 ×98 24×(61 +81 ) 6 (53+41 )×60–27 5–61 –65 计算题训练九 用简便方法计算: (51–71 )×70 97×965 53×8+53×2 15×73 +15×74 (98+43 –32 )×72 72×(21 –31 +41 ) (95+131 )×9+134 30×(21 –31 +61 ) 712×(67 +314) 187 ÷5+51×1811