小数乘法简便计算50题
- 格式:doc
- 大小:29.50 KB
- 文档页数:3
五年级小数乘法的简便计算50题
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