凑十法-破十法-借十法-练习题.docx

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小学一年级上册数学试题
加法 与 减法
进位加法（凑十法口诀：看大数，分小数，凑成十，算得数。）
退位减法（破十法口诀：看大数，分出10，减小数，加剩数。）
借十法（十几减9，几加 = 7 + 5 =
6 + 9 = 6 + 8 = 6 + 7 =
6 + 6 = 6 + 5 = 5 + 9 =
5 + 8 = 5 + 7 = 5 + 6 =
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4 + 9 = 4 + 8 = 4 + 7 =
3 + 9 = 3 + 8 = 2 + 9 =
【 练****题. 二 】 （破十法）
18 – 9 = 17 – 9 = 16 – 9 = 15 – 9 = 11 – 4=
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14 – 9 = 13 – 9 = 12 – 9 = 11 – 9 = 12 – 3 =
17 – 8 = 16 – 8 = 15 – 8 = 14 – 8 = 11 – 3 =
13 – 8 = 12 – 8 = 11 – 8 = 16 – 7 = 11 – 2 =
15 – 7 = 14 – 7 = 13 – 7 = 12 – 7 = 11 – 5 =
11 – 7 = 15 – 6 = 14 – 6 = 13 – 6 = 12 – 4=
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12– 6 = 11 – 6 = 14 – 5 = 13 – 5 = 13 – 4=
【 练****题. 三 】 （20以退位减法）
破十法口诀：看大数，分出10；减小数，加剩数。
15 － 6 = 12 － 5 = 17 － 9 =
13 － 4 = 11 － 5 = 14 － 7 =
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16 － 8 = 15 － 9 = 18 － 9 =
12 － 7 = 14 － 9 = 13 － 7 =
12 － 9 = 11 － 3 = 12 － 4 =
16 － 9 = 15 － 8 = 13 － 8 =
11 － 6 = 13 － 4 = 14 － 5 =
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