小朋友看到的是哪一幅图?在( )里画“√”。
解:
I often have maths class in the morning. ( )
47+29=____ 6+57=____ 40-18=____ 65-56=____
39+57-21=____ 52-(60-24)=____ 71-15-26=____ 91-58+17=____