《2025年新思维口算题卡五年级数学下册苏教版》

5. 解方程。
① $x÷0.8 = 7.2$ ② $2x + 3.7 = 5.9$ ③ $4.5×3 + 4x = 20$ ④ $16.52 + 0.4x = 18.6$
⑤ $x - 0.3x = 0.21$ ⑥ $2.5x + 7.5×1.2 = 29$ ⑦ $(x - 32)×15 = 135$ ⑧ $56÷x - 1.27 = 78.73$

答案：  5. ① x = 5.76 ② x = 1.1 ③ x = 1.625 ④ x = 5.2 ⑤ x = 0.3 ⑥ x = 8 ⑦ x = 41 ⑧ x = 0.7