第2单元 百分数（二）-【优佳好】2023-2024学年六年级下册数学口算计算能力提升（人教版）

单元 2 　 第 1 课时　 折扣(教材 P8) 6 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　45 × 10% = 32 × 25% = 18 × 30% = 0. 9 × 70% = 1. 6 × 40% = 7 ÷20% = 2. 5 ÷ 25% = 40 ÷ 12. 5% = 0. 6 ÷ 15% = 32 ÷ 80% = 45 ÷ 60% = 30 × 2. 5% = 40 ÷ 25% = 12 ÷ 30% = 38 × 5% = 4. 2 ÷ 70% = 46 × 30% = 80 × 20% = 1 ÷50% = 55 × 60% = 1 -70% = 80% +30% = 400 × 7. 5% = 150 × 40% = 70 × 50% = 90% -60% = 40 × 40% = 15 × 300% = 600 × 30% = 300 × 5% = 400 ÷ 20% = 36 ÷ 90% = 3000 × 60% +300 ÷ 52 　 　 　 　 　 　 60 × (20% +0. 8 - 5 6 )　 　 　 　 　 　 730 × 60% -630 × 60% 125%x - x =28 (1 + 40% )x =98 1 - 20%x = 14 5 单元 2 　 第 2 课时　 成数(教材 P9) 6 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　50 × 14% = 48 ÷ 60% = 25 × 30% = 200 × 0. 75% = 450 ÷ 20% = 90 ÷ 45% = 70% -30% = 80 × 10% = 60 × 60% = 45 × 70% = 35 ÷ 50% = 3. 8 × 200% = 250 × 20% = 100 × 50% = 80 × 60% = 20 × 15% = 40 × 37. 5% = 500 × 2. 4% = 120 × 20% = 200 × 12. 5% = 500 × 20% = 300 × 1. 2% = 70 ÷ 35% = 90% -70% = 1000 × 3. 35% = 16 ÷ 80% = 110% ×90% = 0. 15 ÷ 15% = 10 ÷ 62. 5% = 3 ÷6% = 1. 1 × 30% = 2 ÷20% = 180 × 40% -40　 　 　 　 　 　 　 45 ÷ 7 8 + 6 7 × 25% 　 　 　 　 　 　 　 48% × 5 6 + 4 ÷ 1 3 5 25%x -16 = 24 1 - 50%x = 12 40%x ÷3 = 1. 2 6 单元 2 　 第 3 课时　 税率(教材 P10) 6 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　7 8 - 25% = 60% × 2 3 = 5 9 ÷ 90% = 62. 5% -12. 5% = 36% × 12 = 40% ÷ 1 3 = 2. 4 × 3 8 = 3. 5 - 150% = 5 6 - 50% = 20% ÷2 = 4. 8 ÷ 12% = 2. 8 × 40% = 4 5 - 70% = 30% +20% = 75% ÷15 = 65% +4. 35% = 32% ×50 = 4 ÷ 20% = 40% ×80% = 135 ÷ 50% = 51% ÷17 = 1. 5 × 50% = 87% -49% = 75% ×3 = 40% ×10 = 34 × 50% = 20% ×30 = 0. 41 - 13% = 14 ÷ 35% = 5. 4 + 160% = 15 ÷ 25% = 1. 5 × 40% = 5 6 - 82% + 1 6 - 18% 　 　 　 　 　 12 5 × ( 5 6 + 3 4 ) + 52% 　 　 　 　 　 (72% ÷3 +9. 75) ÷ 9 10 1 34 - 50%x = 7 8 75%x +7. 8 = 17. 8 5%x -0. 03 × 70 = 15 7 单元 2 　 第 4 课时　 利率(教材 P11) 6 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　100 × 50% = 60% ×80 = 20 ÷ 5% = 12% +50% = 50 × 120% = 5 ×90% = 300 × 3% = 6