你好
0.98*42
=（1-0.02）*42
=1*42-0.02*42
=42-0.84
=41.16
8.4*0.26+0.27
=2.184+0.27
=2.454
【数学辅导团】为您解答,不理解请追问,理解请及时选为满意回答!(*^__^*)谢谢!
简算：0.98*42 简算：8.4*0.26+0.27
你好
0.98*42
=（1-0.02）*42
=1*42-0.02*42
=42-0.84
=41.16
8.4*0.26+0.27
=2.184+0.27
=2.454
【数学辅导团】为您解答,不理解请追问,理解请及时选为满意回答!(*^__^*)谢谢!