小括号口算练习题
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24 +(8+4)= 23+(9-8)= 40-(2+8)=
32-(4+6)= 72-(9-5)= 66-(4+6)=
39-(4+5)= 89-(7-5)= 63+(3+7)=
38+(50+6)= 4+(23+42)= 60+(30-7)=
15+(30-10)= 17+(15-5)= 40+(36-10)=
40+(34-6)= 84+(2+8)= 50-(37-7)=
10+(50-45)= 22+(4+36)= 20+(42-8)=