口算，看谁算得又快又准．
72÷8= 28+16= 800÷4= 74﹣47= 2400÷6= 0÷20=
32×20= 60×90= 3000÷6= 45÷5×3= 378÷5≈ 21×22≈
相关试题
口算，看谁算得又快又准．
72÷8= 28+16= 800÷4= 74﹣47= 2400÷6= 0÷20=
32×20= 60×90= 3000÷6= 45÷5×3= 378÷5≈ 21×22≈
米长的木棒锯成相等的若干段做学具，共锯了4次，每段长多少米？
=
=
= 5.6÷4=
=
=
=
=
+
=
÷
=（
﹣
）×18=
×
=
﹣
=
×
÷
=
×
= 6÷
= 1÷
÷1= 2
=
= 1
÷1+
÷3= 1
÷0.8=5.4×
=
×0.7+0.3=
×1.2= 1÷2
= 1.8÷
=
×
÷
=
+
）×12= 3﹣
÷0.75= 24
÷8= 4÷
﹣
÷4=
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