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五年级上册 小数乘法(笔算)

姓名:_______________ 学号:_______________ 用时:_______________
(1.2 + 1.9) × 3.2 = (4.8 + 0.7) × 1.9 = 8.1 × 9.8 =
8 × 4.8 × 0.125 = 7.48 × 1.03 ≈ (保留两位小数) 2 × 3.6 × 0.5 =
(0.7 + 2.5) × 4.7 = 3.6 × 2 × 0.5 = (3.4 + 3.0) × 4.9 =
4 × 2.5 × 1.6 = 0.25 × 4 × 6.8 = 9.9 × 4 =
4.8 × 9.6 = 8.63 × 8.92 ≈ (保留两位小数) 7.36 × 2.6 ≈ (保留两位小数)
1.7 × 5.0 = 8.2 × 0.6 = 6.7 × 7 =
0.2 × 5 × 3.5 = 7.6 × 3.8 = 6.15 × 6.59 ≈ (保留两位小数)
0.25 × 4 × 8.4 = 5.4 × 8 = 0.33 × 5.74 ≈ (保留两位小数)
(3.4 + 0.3) × 2.7 = 1.93 × 1.06 ≈ (保留两位小数) 0.5 × 2 × 5.8 =
(3.4 + 4.9) × 0.9 = 4.55 × 7.93 ≈ (保留两位小数) 9.6 × 5.3 =
4.2 × 9.3 = 4 × 2.5 × 3.6 = 2.2 × 47 =
2.26 × 4.62 ≈ (保留两位小数) 1.7 × 5.0 = 2.4 × 6.2 =
3.39 × 5.32 ≈ (保留两位小数) 4 × 6.8 × 0.25 = (0.5 + 0.4) × 1.6 =
7.07 × 7.06 ≈ (保留两位小数) (0.1 + 1.2) × 3.4 = 8.22 × 6.91 ≈ (保留两位小数)
(4.1 + 4.2) × 4.5 = 1.92 × 2.71 ≈ (保留两位小数) 0.5 × 33 =
0.125 × 6.4 × 8 = (1.6 + 4.8) × 3.5 = (1.4 + 0.9) × 4.4 =
(3.9 + 4.1) × 4.5 = 2.42 × 4.56 ≈ (保留两位小数)
五年级上册 小数乘法(笔算)(答案)
姓名:_______________ 学号:_______________ 用时:_______________
(1.2 + 1.9) × 3.2 = 9.92 (4.8 + 0.7) × 1.9 = 10.45 8.1 × 9.8 = 79.38
8 × 4.8 × 0.125 = 4.8 7.48 × 1.03 ≈ (保留两位小数) 7.70 2 × 3.6 × 0.5 = 3.6
(0.7 + 2.5) × 4.7 = 15.04 3.6 × 2 × 0.5 = 3.6 (3.4 + 3.0) × 4.9 = 31.36
4 × 2.5 × 1.6 = 16 0.25 × 4 × 6.8 = 6.8 9.9 × 4 = 39.6
4.8 × 9.6 = 46.08 8.63 × 8.92 ≈ (保留两位小数) 76.98 7.36 × 2.6 ≈ (保留两位小数) 19.14
1.7 × 5.0 = 8.5 8.2 × 0.6 = 4.92 6.7 × 7 = 46.9
0.2 × 5 × 3.5 = 3.5 7.6 × 3.8 = 28.88 6.15 × 6.59 ≈ (保留两位小数) 40.53
0.25 × 4 × 8.4 = 8.4 5.4 × 8 = 43.2 0.33 × 5.74 ≈ (保留两位小数) 1.89
(3.4 + 0.3) × 2.7 = 9.99 1.93 × 1.06 ≈ (保留两位小数) 2.05 0.5 × 2 × 5.8 = 5.8
(3.4 + 4.9) × 0.9 = 7.47 4.55 × 7.93 ≈ (保留两位小数) 36.08 9.6 × 5.3 = 50.88
4.2 × 9.3 = 39.06 4 × 2.5 × 3.6 = 36 2.2 × 47 = 103.4
2.26 × 4.62 ≈ (保留两位小数) 10.44 1.7 × 5.0 = 8.5 2.4 × 6.2 = 14.88
3.39 × 5.32 ≈ (保留两位小数) 18.03 4 × 6.8 × 0.25 = 6.8 (0.5 + 0.4) × 1.6 = 1.44
7.07 × 7.06 ≈ (保留两位小数) 49.91 (0.1 + 1.2) × 3.4 = 4.42 8.22 × 6.91 ≈ (保留两位小数) 56.80
(4.1 + 4.2) × 4.5 = 37.35 1.92 × 2.71 ≈ (保留两位小数) 5.20 0.5 × 33 = 16.5
0.125 × 6.4 × 8 = 6.4 (1.6 + 4.8) × 3.5 = 22.4 (1.4 + 0.9) × 4.4 = 10.12
(3.9 + 4.1) × 4.5 = 36 2.42 × 4.56 ≈ (保留两位小数) 11.04