第四单元 比例-【优佳好】2023-2024学年六年级下册数学口算计算能力提升（苏教版）

单元四 　 第 1 课时　 图形的放大与缩小 6 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　2 13 ÷ 2 5 = 4 5 ÷ 20% = 2 3 × 1 7 = 3. 6 × 5 6 = 7 13 × 26 49 = 2 3 × 30% = 1 ÷ 2 3 = 1. 5 ÷ 5 9 = 3 4 ÷ 15 8 = 1 4 × 80% = 10 - 5. 4 = 3 8 + 1 4 = 124 ÷ 4 = 30 × 13 = 2 3 × 12 = 5. 1 ÷ 17 = 5 8 × 80 = 7. 2 ÷ 0. 08 = 4 ÷ 25% = 1 3 ÷ 3 8 = 3 4 × 8 9 = 24 × 75% = 13 24 ÷ 13 = 5 8 × 5 8 = 1. 8 - 40% = 25 × 6 = 5 × 20% = 12 × 3 4 = 1 2 × 11 20 + 1 2 ÷ 20 49　 　 　 　 　 　 　 　 8 9 × (9 + 3 4 ) - 2 3 　 　 　 　 　 　 　 　 1 4 ÷ ( 2 3 + 1 2 ) × 80% 4 9 x - 1 3 x = 11 9 3 4 x -5%x =1. 75 x ÷ 9 8 = 7 18 ÷ 1 2 02 单元四 　 第 2 课时　 比例的意义 6 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　5 38 × 1. 9 = 5 8 × 48 = 2 9 × 3 8 = 5 7 ÷ 25 = 0. 56 × 47 = 8 15 × 75% = 5 18 ÷ 3 4 = 20 21 × 3 10 = 5 8 ÷ 1 4 = 3 8 × 4 9 = 1 2 + 1 3 = 1 2 - 1 3 = 1 ÷ 1516 = 7 12 × 24 = 500 × 3% = 1 100 ÷ 10% = 4 7 ÷ 3 5 = 3 4 ÷ 7 20 = 12. 5% × 2 9 = 17 36 × 18 = 45 × 49 = 9 14 × 7 9 = 1 3 ÷ 75% = 2 3 × 37. 5% = 5 12 ÷ 5 = 5 7 ÷ 7 5 = 15 4 ÷ 62. 5% = 2 3 ÷ 4 9 = ( 34 - 2 3 ) ÷ 3 8 　 　 　 　 　 　 　 　 　 ( 5 12 - 1 8 ) × 4. 8　 　 　 　 　 　 　 　 　 ( 1 12 + 1 13) × 12 × 13 2x -70%x =52 x + 56 x =88 4x + 5 8 = 3 4 12 单元四 　 第 3 课时　 练习六 6 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　3. 14 × 2 = 3. 14 × 7 = 3. 14 × 0. 9 = 3. 14 × 50 = 3. 14 × 600 = 3. 14 × 40 = 3. 14 × 9 = 6. 28 ÷ 2 = 12. 56 ÷ 4 = 12. 56 ÷ 3. 14 = 3. 14 × 102 = 3. 14 × 0. 52 = 8 × 716 = 0. 8 × 3 4 = 7 20 ÷ 7 10 = 8 9 × 1 12 = 0. 3 ÷ 34 = 2 5 ÷ 3. 5 = 7 8 ÷ 62. 5% = 1 3 + 25% = 7 2 ÷ 8 7 = 5 12 × 40% = 0. 6 × 5 12 = 0. 375 ÷ 3 5 = 75% × 23 = 5 14 ÷ 5 21 = 8 27 ÷ 2 9 = 3 7 × 0. 14 = 7 24 ÷ 4 15 × 0. 32　 　 　 　 　 　 　 　 7 10 + ( 4 7 + 1 2 ) × 7 25　 　 　 　 　 　 　 　 6 13 ÷ [ 7 11 × (1 - 3 7 )] 20 3 x ÷ 4 3 = 16 3 5 12x - 7 20x = 14 15 11%x +70%x =5. 4 22 单元四 　 第 4 课时　 比例的基本性质 6 年级 下 S 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　7 8 × 4 = 5 6 ÷ 2 3 = 3 7 × 1 7 = 4. 5 × 4 9 = 5 4 - 1 3 = 3 5 + 1 4 = 20 ÷ 0. 1