1、20以内破十法练习题口诀20以内减法练习题(破十法)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。)例:15 8 = 75 102189= 17 9= 16 9=159= 14 9 = 139=129= 11 9 = 17 8=168= 15 8 = 14 8=138= 12 8= 118=167= 15 7= 14 7=137= 12 7 = 11 7=156= 14 6= 136=126= 11 6 = 14 5=135= 12 5= 11 5=134= 12 4= 11 4 =123= 11 3= 11 2=135= 1
2、2 5= 11 5=134= 12 4= 11 4 =167= 15 7= 14 7=189= 17 9= 16 9=159= 14 9 = 13 9=137= 12 7 = 11 7=129= 11 9 = 17 8=168= 158 = 14 8=134= 12 4= 11 4 =123= 11 3= 11 2=135= 125= 11 5=138= 12 8= 11 8=167= 15 7= 14 7=126= 116 = 14 5=159= 14 9 = 13 9=134= 12 4= 11 4 =123= 113= 11 2=135= 12 5= 11 5=138= 12 8= 11
3、 8=167= 157= 14 7=126= 11 6 = 14 5=159= 14 9 = 13 9=134= 124= 11 4 =167= 15 7= 14 7=189= 17 9= 16 9=159= 14 9 = 13 9=137= 12 7 = 11 7=129= 11 9 = 17 8=168= 15 8 = 14 8=134= 12 4= 11 4 =167= 15 7= 14 7=189= 17 9= 16 9=159= 14 9 = 13 9=137= 12 7 = 117=129= 11 9 = 17 8=168= 15 8 = 14 8=134= 12 4= 114 =
4、123= 11 3= 11 2=135= 12 5= 11 5=138= 12 8= 11 8=167= 15 7= 14 7=126= 11 6 = 14 5=159= 14 9 = 13 9=134= 12 4= 11 4 =123= 11 3= 11 2=135= 12 5= 11 5=138= 12 8= 11 8=167= 15 7= 14 7=126= 11 6 = 14 5=159= 14 9 = 13 9=134= 12 4= 11 4 =167= 15 7= 14 7=189= 17 9= 16 9=159= 14 9 = 13 9=137= 12 7 = 117=129=
5、11 9 = 17 8=168= 15 8 = 14 8=134= 12 4= 114 =167= 15 7= 14 7=189= 17 9= 16 9=159= 149 = 13 9=137= 12 7 = 11 7=129= 11 9 = 17 8=168= 158 = 14 8=134= 12 4= 11 4 =123= 11 3= 11 2=135= 125= 11 5=138= 12 8= 11 8=167= 15 7= 14 7=126= 116 = 14 5=159= 14 9 = 13 9=134= 12 4= 11 4 =123= 113= 11 2=135= 12 5= 11 5=138= 12 8= 11 8=167= 157= 14 7=126= 11 6 = 14 5=159= 14 9 = 13 9=134= 124= 11 4 =167= 15 7= 14 7=189= 17 9= 16 9=159= 14 9 = 13 9=137= 12 7 = 11 7=129= 11 9 = 17 8=168= 15 8 = 14 8=
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