第5单元 三角形-【优佳好】2023-2024学年四年级下册数学口算计算能力提升（人教版）

单元 5 　 第 1 课时　 三角形的特性(教材 P60) 4 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　18 + 32 = 7. 8 ÷ 10 = 15 × 40 = 52 × 10 = 630 ÷ 30 = 4800 ÷ 60 = 75 × 20 = 108 × 7 = 9. 27 × 100 = 780 - 290 = 315 ÷ 100 = 240 × 3 = 130 + 250 = 480 ÷ 4 = 708 × 5 = 326 - 116 = 90 + 57 = 0. 18 × 10 = 560 ÷ 40 = 78 ÷ 3 = 690 ÷ 30 = 3. 15 × 100 = 240 - 80 = 4. 8 ÷ 10 = 540 × 20 = 840 ÷ 40 = 327 + 173 = 546 - 446 = 140 × 30 = 125 × 40 = 25 × 80 = 340 × 20 = (521 + 504) ÷ 25　 　 　 　 (39 - 21) × (36 ÷ 6)　 　 　 　 9 × [(13 + 25) × 2] 25 × 97 - 25 × 33 175 + 364 + 25 + 136 2800 ÷ 50 ÷ 2 04 单元 5 　 第 2 课时　 三角形的三边关系(教材 P62) 4 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　39 - 24 = 80 + 60 = 0. 25 × 100 = 18 + 81 = 2 × 20 = 40 × 200 = 48 × 10 = 0 × 128 = 1. 47 × 100 = 48 ÷ 2 = 39 + 24 = 540 ÷ 6 = 35 - 20 = 180 ÷ 100 = 450 ÷ 30 = 400 ÷ 80 = 40 × 50 = 39 - 24 = 8. 12 ÷ 10 = 270 ÷ 9 = 143 + 157 = 7. 3 ÷ 10 = 39 × 10 = 107 × 6 = 218 × 0 = 8. 46 × 1000 = 90 × 80 = 58 + 42 = 600 ÷ 30 = 480 ÷ 40 = 0. 08 × 100 = 145 × 20 = 913 - 276 ÷ 23　 　 　 　 　 3900 ÷ (13 × 6) - 49　 　 　 　 　 640 ÷ [(35 + 45) × 2] 469 - (269 + 37) 25 × 97 - 25 × 33 125 × 6 × 80 14 单元 5 　 第 3 课时　 练习课(教材 P62) 4 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　900 ÷ 30 = 25 × 30 = 270 - 190 = 960 ÷ 80 = 22 × 40 = 904 × 5 = 240 × 4 = 32 × 6 = 25 × 8 = 810 ÷ 30 = 240 × 30 = 13 × 7 = 45 + 155 = 809 - 109 = 50 ÷ 5 = 160 × 4 = 47 + 153 = 930 ÷ 30 = 40 × 90 = 24 × 10 = 61 × 80 = 140 × 4 = 365 ÷ 100 = 920 ÷ 40 = 208 × 5 = 0. 4 × 100 = 427 + 173 = 489 - 209 = 340 ÷ 20 = 18 × 50 = 800 ÷ 40 = 180 × 5 = 320 ÷ 80 = 136 × 20 = 575 ÷ 5 = 108 × 4 = 250 × 12 × 4　 　 　 　 　 　 　 177 × 99 + 177　 　 　 　 　 　 　 56 × 101 9800 ÷ (98 × 2) 436 + 175 + 225 348 - 142 - 58 24 单元 5 　 第 4 课时　 三角形的分类(教材 P63) 4 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　130 × 5 = 15 × 40 = 650 ÷ 50 = 48 × 20 = 3 × 330 = 0. 3 ÷ 100 = 123 ÷ 3 = 12 × 30 = 12 × 9 = 560 ÷ 70 = 13 × 50 = 760 ÷ 40 = 30 × 30 = 14 × 7 = 720 + 90 = 845 - 145 = 65 ÷ 1