第一单元 两位数乘两位数-【优佳好】2023-2024学年三年级下册数学口算计算能力提升（苏教版）

单元一 　 第 1 课时　 两位数乘整十数的口算和估算(1) 3 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　60 × 13 = 11 × 60 = 21 × 70 = 15 × 30 = 20 × 47 = 32 × 40 = 20 × 24 = 25 × 20 = 38 × 20 = 15 × 60 = 18 × 40 = 14 × 10 = 25 × 30 = 60 × 12 = 50 × 20 = 19 × 10 = 30 × 30 = 40 × 15 = 12 × 70 = 23 × 20 = 17 × 50 = 18 × 50 = 30 × 20 = 26 × 10 = 40 × 24 = 20 × 15 = 42 × 30 = 18 × 20 = 16 × 60 = 50 × 70 = 16 × 20 = 12 × 40 = 20 × 60 = 22 × 40 = 51 × 20 = 60 × 40 = 71 × 18≈ 91 × 18≈ 19 × 21≈ 68 × 30≈ 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　54 × 7 = 36 × 8 = 142 × 5 = 370 × 5 = 642 × 3 = 239 × 7 = 1 单元一 　 第 2 课时　 两位数乘整十数的口算和估算(2) 3 年级 下 S 12 × 40 = 23 × 30 = 35 × 20 = 24 × 40 = 36 × 20 = 80 × 70 = 24 × 30 = 30 × 10 = 200 × 7 = 52 × 17≈ 11 × 40 = 32 × 30 = 40 × 30 = 13 × 50 = 80 × 30 = 31 × 30 = 10 × 40 = 50 × 70 = 18 × 20 = 33 × 21≈ 32 × 20 = 34 × 20 = 11 × 70 = 26 × 20 = 21 × 40 = 70 × 20 = 50 × 20 = 12 × 60 = 60 × 70 = 13 × 38≈ 22 × 40 = 11 × 80 = 13 × 60 = 16 × 50 = 13 × 40 = 15 × 20 = 24 × 20 = 40 × 15 = 50 × 21 = 62 × 32≈ 67 × 8 = 　 　 　 　 　 　 　 　 　 84 × 5 = 　 　 　 　 　 　 　 　 　 130 × 6 = 215 × 4 = 28 × 9 = 409 × 7 = 2 单元一 　 第 3 课时　 两位数乘两位数的不进位笔算(1) 3 年级 下 S 25 × 3 = 80 × 50 = 23 × 30 = 230 × 3 = 19 × 3 = 20 × 90 = 40 × 20 = 13 × 10 = 12 × 40 = 40 × 80 = 190 × 5 = 320 × 3 = 15 × 30 = 180 × 4 = 240 × 4 = 81 × 20 = 32 × 20 = 30 × 40 = 33 × 30 = 41 × 20 = 40 × 50 = 200 × 5 = 20 × 6 = 16 × 5 = 350 × 2 = 11 × 50 = 140 × 2 = 15 × 40 = 14 × 60 = 16 × 40 = 16 × 60 = 50 × 60 = 45 × 2 = 130 × 6 = 380 × 2 = 60 × 90 = 10 × 77 = 7 × 800 = 90 × 70 = 30 × 80 = 21 × 13 = 　 　 　 　 　 　 　 　 　 12 × 14 = 　 　 　 　 　 　 　 　 　 24 × 12 = 22 × 24 = 11 × 26 = 41 × 21 = 3 单元一 　 第 4 课时　 两位数乘两位数的不进位笔算(2) 3 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　20 × 90 = 11 × 11 = 34 × 10 = 19 × 20 = 80 × 90 = 31 × 30 = 11 × 40 = 18 × 20 = 60 × 90 = 10 × 20 = 30 × 50 = 20 × 40 = 40 × 22 = 30 × 3 = 90 × 3 = 46 × 10 = 10 × 77 = 12 × 50 = 23 × 20 = 30 × 21 = 13 × 10 = 13 × 40 = 15 × 50 = 14 × 12 = 10 ×