一、 用简便方法计算
(1)2.5×3.5×4 (2) 12.5×0.46×0.8 (3) 0.25×0.93×4
(4) 1.76×12.5×8 (5)0.25×9.5×4 (6) 12.5×2.5×0.8×0.4
(7) 3.2×0.25×12.5 (8) 0.25×36 (9) 1.25×2.5×32
二、 用简便方法计算
(10)3.7×1.5+6.3×3.7 (11) 10.6×2.9-0.6×2.9
(12) 0.93×4.5+9.07×4.5 (13)56.5×99+56.5
(14) 7.9×3.7-7.9×3.7 (15)7.6×2.7+2.4×2.7
(16)1.3×17+1.3×83 (17)7.59×11.8-1.8×7.5
(18)7.7×12.1-2.1×7.7 (19)0.74×1.5+1.5×1.26
(20)3.6×0.35-3.6×0.35 (21)7.2×9.8+0.2×7.2
(22)1.58×8.6+0.42×8.6 (23)9.99×8.88+1.12×9.99
(24)4.5×25-50×2.5 (25) 4.4×7.8+78×0.56
(26) 3.6×4.7-36×0.37 (27) 101×0.87-0.91×87
(28) 6.6×3.3+6.6×6.7 (29) 7.5×8+0.2×25
(30)4.6×57+4.3×46 (31)3.14×0.68+31.4×0.032
(32)45×1.58+5.5×15.8 (33)0.729×343+0.657×729
(34)314×0.043+3.14×7.2-31.4×0.15 (35)0.87×9.9+0.87
(36)12.7×9.9+1.27 (37)9.9×99+9.97.39×12.8-2.8×7.39
三、 用简便方法计算
(38)9.9×99+9.9 (39)4.9×99+4.9
(40)14.2×99+14.2 (41) 9.4×11-9.4
(42)0.65×101 (43) 7.9×1.01
(44) 4.5×10.2 (45)101 ×2.5
(46) 0.19×99 (47)0.32×403
(48)3.65×10.1 (49) 0.85×9.9
(50)4.5×102