1、(1)4 78
(2)89 4.3
(3)8 0.4
(4)10 0.2 10 - 0.2
2、= 3.26 ×(5.7 - 0.7)
= 3.26 × 5
= 16.3
= 8 ×(0.125 × 8)
= 8 × 1
= 8
= 0.68 ×(100 + 1)
= 68 + 0.68
= 68.68
= 213 ×(1.25 × 0.8)
= 213 × 1
= 213
3、48 × 0.025 × 12 = 1.2 × 12 = 14.4(吨)
4、25.5 × 2 + 12.5 × 2 = 76(元)