去括号、加括号练习题四年级下册”括号”练习题125256 (13575)(145) 1206055 1024163 (135415)5+16 12002018720-72015 648742 15 240+480302 225-10(6+13) (1202+120)9 164-135+85330(6550) 13268(9757 64(126513)199696274 (2012024)8 320(8-4) 2 117133615 182(36-23) 7 (1012024)5 288(26-14) 8 27(263+37)50 1286816 - 2 -