先用计算器计算，再观察概括出规律．（1）34×101=48×101=84×101=…AB×101=（2）348×1001=856×1001=627×1001=…ABC×1001=
直接写出得数．×4=×=÷=××= 1÷= 1÷=×0.75=×14+= 1﹣=+=÷5=÷×÷=
直接写得数+=﹣= 1÷= 7×=×3=+=﹣=÷=÷4= 3÷=+= 18×=
直接写出得数：﹣= 0×=÷1= 24.26+0.4=
直接写出得数 +=﹣= 12×=×14= 20÷=×= 0×=÷=÷×12= 14×÷14×=
直接写出得数 1÷=+=÷=÷=×=+0.8=÷1=×=+=﹣= 24÷=÷=
×4=
×
=
÷
=
×
=
= 1
÷
=
×0.75=
×14+
﹣
=
+
=
÷
×
+
=
﹣
= 1÷
= 7×
=
×3=
+
=
﹣
=
÷
÷4= 3÷
=
+
= 18×
=
﹣
=
=
÷1=
+
=
﹣
= 12×
=
×14= 20÷
=
×
= 0×
=
÷
=
÷
×12= 14×
÷14×
=
+
=
÷
=
÷
×
=
+0.8=
÷1=
×
=
+
=
﹣
=
=
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