1 用竖式计算。
(1) $1.5×2.08=$
(2) $26.4×0.008=$
(3) $0.017×0.12=$
(4) $3.25×6.4=$

(1) 3.12 (2) 0.2112 (3) 0.00204 (4) 20.8

2 用简便方法计算。
(1) $1.25 × 0.25 × 4.8$
(2) $1.23 × 9.99$
(3) $(3.8 × 8.7 - 3.8 × 7.9) × 1.25$
(4) $3.6 × 3.1 + 3.6 × 5.9 + 3.6$
(5) $5.4 × 0.29 + 2.9 × 0.46$
(6) $1.7 × 2.5 + 1.7 × 3.4 + 5.9 × 8.3$

(1) 1.5 (2) 12.2877 (3) 3.8 (4) 36 (5) 2.9 (6) 59