第4课时 等式的性质与解方程(2)1.(1)x=0.1 (2)x=4.5 (3)x=0.5 (4)x=4 (5)x=4 (6)x=752.(1) x÷2.5=4解:x÷2.5×2.5=4×2.5 x=10(2) 0.4x=3.6解:0.4x÷0.4=3.6÷0.4 x=93.解:4x÷4=124÷4 x=31解:x÷2.7×2.7=3×2.7 x=8.1解:18x÷18=9÷18 x=0.5解:x÷8×8=1.6×8 x=12.84. 3.8 1.3 1.6 11.2 4 1.25. (1) 5x=85解: |