第三单元计算专项04：减法的性质逆用-2025-2026学年四年级数学下册人教版

2025-2026学年四年级数学下册人教版 第三单元计算专项04：减法的性质逆用 日期： 用时： 评价： 一、括号的拆解 a−(b+c) 型 (1)146−(46+72) (2)559−(159+272) (3)567−(67+41) (4)868−(268+48) (5)368−(277+68) (6)415−(26+115) (7)255−(51+155) (8)269−(28+69) (9)344−(37+144) (10)933−(36+133) 二、括号的拆解 a−(b−c) 型 (1)74−(34−19) (2)453−(153−125) (3)597−(197−69) (4)925−(125−88) (5)636−(136−232) (6)487−(187−75) (7)362−(62−113) (8)545−(145−251) (9)869−(569−18) (10)379−(79−187) 三、凑整逆用 (1)156 - 99 (2)200 - 98 (3)300 - 199 (4)450 - 298 (5)500 - 399 (6)600 - 498 (7)750 - 599 (8)800 - 698 (9)900 - 799 (10)1000 - 898 第 1 页 共 8 页 学科网（北京）股份有限公司 参考答案 一、括号的拆解 a−(b+c) 型 (1)146−(46+72) = 146−46−72 = 100−72 = 28 (2)559−(159+272) = 559−159−272 = 400−272 = 228 (3)567−(67+41) = 567−67−41 = 500−41 = 459 (4)868−(268+48) = 868−268−48 = 600−48 = 552 (5)368−(277+68) =368−277−68 = 368−68−277 = 300−272 = 28 (6)415−(26+115) = 415−26−115 = 415−115−26 = 300−26 = 274 (7)255−(51+155) = 255−51−155 = 255−155−51 = 100−51 = 49 (8)269−(28+69) = 269−28−69 = 269−69−28 = 200−28 = 172 (9)344−(37+144) = 344−37−144 = 344−144−37 = 200−37 = 163 (10)933−(36+133) = 933−36−133 = 933−133−36 = 800−36 = 764 二、括号的拆解 a−(b−c) 型 (1)74−(34−19) = 74−34+19 = 40+19 = 59 (2)453−(153−125) = 453−153+125 = 300+125 = 425 (3)597−(197−69) = 597−197+69 = 400+69 = 469 (4)925−(125−88) = 925−125+88 = 800+88 = 888 (5)636−(136−232) = 636−136+232 = 500+232 = 732 (6)487−(187−75) = 487−187+75 = 300+75 = 375 (7)362−(62−113) = 362−62+113 =300+113 = 413 (8)545−(145−251) = 545−145+251 = 400+251 = 651 (9)869−(569−18) = 869−569+18 = 300+18 = 318 (10)379−(79−187) = 379−79+187 = 300+187 = 487 三、凑整逆用 (1)156 - 99 = 156 - (100 - 1) = 156 - 100 + 1 = 56 + 1 = 57 (2)200 - 98 = 200 - (100 - 2) = 200 - 100 + 2 = 100 + 2 = 102 (3)300 - 199 = 300 - (200 - 1) = 300 - 200 + 1 = 100 + 1 = 101 (4)450 - 298 = 450 - (300 - 2) = 450 - 300 + 2 = 150 + 2 = 152 (5)500 - 399 = 500 - (400 - 1) = 500 - 400 + 1 = 100 + 1 = 101 (6)600 - 498 = 600 - (500 - 2) = 600 - 500 + 2 = 100 + 2 = 102 (7)750 - 599 = 750 - (600 - 1) = 750 - 600 + 1 = 150 + 1 = 151 (8)800 - 698 = 800 - (700 - 2) = 800 - 700 + 2 = 100 + 2 = 102 (9)900 - 799 = 900 - (800 - 1) = 900 - 800 + 1 = 100 + 1 = 101 (10)1000 - 898 = 1000 - (900 - 2) = 1000 - 900 + 2 = 100 + 2 = 102 $