小学数学补充习题课标苏教版五年级下册五.docxVIP

小学数学补充习题课标苏教版五年级下册五 五 下 数 学 补 充 习 题 答 案第1页 答 案 1 等 式 9 - x = 38 0÷4 = 2 07 y = 6 3 , 2 0 + 3 0 = 5 0y + 1 7 = 3 85 4÷x = 9 方 程 9 - x = 37 y = 6 3y + 1 7 = 3 85 4÷x = 9。 23 0 + x = 8 04 x = 8 0 35 2 + x = 1 1 0 4x + 1 0 = 5 0 , 3 x = 2 0 + 7 0。 第2页 答 案 1- 2 0+ 5 4+ 5 4。 2 解 x = 7 0 + 3 5 x = 1 0 5 解 x = 8 4 - 4 8 x = 3 6 解 x = 5 0 + 5 0 x = 1 0 0 解 x = 1 0 0 - 2 7 x = 7 3 解 x = 7 0 + 2 0 x = 9 0 解 x = 9 - 3 x = 6 3x + 2 0 = 1 0 0 解 x = 1 0 0 - 2 0 x = 8 0 425。 第3页 答 案 1 等 号 两 边 应 该 同 时 减 去3 6。 x = 6 4 - 3 6 x = 2 8 等 号 两 边 应 该 同 时 加0 . 8 x = 1 . 9 + 0 . 8 x = 2 . 7 2 解 x = 4 9 0 - 2 4 0 x = 2 5 0 解 x = 5 . 5 - 0 . 7 x = 4 . 8 解 x = 9 5 - 6 9 x = 2 6 解 x = 4 7 + 4 7x = 9 4 解 x = 1 2 - 9 . 6 x = 2 . 4 解 x = 1 . 4 + 0 . 7 8 x = 2 . 1 8 3 1x = 3 2 ,2x = 2 0 ,3x = 3 4x + 2 0 = 1 0 0 + 1 0 解 x = 1 0 0 + 1 0 - 2 0 x = 9 0 5 . 5 + x = 1 0 解 x = 1 0 - 5 . 5 x = 4 . 5 第4页 答 案 1 ×  √  ×  √  2 1 解 x = 6 . 3 - 3 . 8 x = 2 . 5 2 解 x = 7 . 2 - 4 . 8 x = 2 . 4 3 解 x = 4 + 1 . 8 x = 5 . 8 4 解 x = 7 . 9 + 2 . 6 x = 1 0 . 5 5 解 x = 6 . 5 + 3 . 2 x = 9 . 7 6 解 x = 2 . 3 - 0 . 4 6 x = 1 . 8 4 3 1x + 3 6 = 4 5 解 x = 4 5 - 3 6 x = 9 2x - 2 = 9 8 或x - 9 8 = 2 解 x = 9 8 + 2 x = 1 0 0 3x - 4 5 = 1 2 8 解 x = 1 2 8 + 4 5 x = 1 7 3 4x + 2 . 7 = 6 . 9 解 x = 6 . 9 - 2 . 7 x = 4 . 2 第5页 答 案 1 1 ÷0 . 3 2 ×5 ×5 2 1 解 x = 7 0÷1 4x = 5 2 解 x = 6 0×1 2 x = 7 2 0 3 解 x = 4 . 5×9 x = 4 0 . 5 3 1x = 5 ;2x = 1 0 0 4( 1 ) 4 x = 2 5 . 6 解 x = 2 5 . 6÷4 x = 6 . 4 ( 2 ) 5 x = 6 0 解 x = 6 0÷5 x = 1 2 第6页 答 案 1 ÷31 5 ×1 . 63 . 3 6 2 1 解 x = 6 . 4÷1 . 6 x = 4 2 解 x = 0 . 3×7 x = 2 . 1 3 解 x = 2 . 1×3 x = 6 . 3 4 解 x = 1 . 5÷5 x = 0 . 3 5 解 x = 6÷0 . 2 x = 3 0 6 解 x = 3×1 . 1 x = 3 . 3 3 11 2 x = 1 8 解 x = 1 8÷1 2 x = 1 . 5 27 x = 2 . 8 解 x = 2 . 8÷7 x = 0 . 4 3n÷2 5 = 3 解 n = 3×2 5 n = 7 5 42 0 x = 8 4 解 x = 8 4÷2 0