试题详情
口算
15+2= | 54-4= | ( )+9=24 | 76-5+9= |
50-10= | 9+20= | 90-( )=30 | 98-6-30=( ) |
8+7= | 77-20= | 8+( )=68 | 23-(5+4)= |
47-8= | 90-7= | ( )-6=17 | 20+(7+60)= |
43-3= | 60-8= | ( )+80=100 | 30-(12-5)= |
知识点
参考答案
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