计算下列各题,能简便的要简便7.6×0.8+0.2×7.60.25×360.25×32×1.250.85×99
计算如图图形中∠A的度数.
计算下面各题,能简算的要简算.⑴0.9+1.08+0.92+0.1 ⑵32.54﹣10.46﹣4.54⑶18.73+3.85﹣2.73⑷45.6﹣(83.7﹣78.8)
用竖式计算并验算.⑴5.84+26.36= ⑵10.25﹣9.68= ⑶20﹣12.39= ⑷15.8+16.28=
口算.
算一算.