甲、乙两人买同样一本书,甲用去他带去钱的,乙用去他带去钱的,甲带去的钱比乙带去的钱多. .(判断对错)
在横线里填上合适的数. (1)+ = (2)+ =1 (3)﹣ = (4) ﹣=0.
看图写算式. (1) + + = . × = (2) + = = . × = = (3) + + + = . × = .
+=+= .(判断对错)
﹣= 想: 个减去 个得 个,就是 .
﹣=﹣= .(判断对错)