用4个边长为2厘米的小正方形拼成一个大正方形，这个大正方形的周长是多少？
+= 24×= 5﹣=÷= 40×=×0.5= 0.4÷=﹣=÷0.4=+=
直接写出结果．﹣= 4.5×102= 341﹣103= 270÷18= 10×10%= 5﹣0.25+0.75= 0.42﹣0.32= 2÷=×6= 4.57+6.43= 7×÷7×= 1÷×=
直接写出得数． 382﹣297﹣3== 2÷== 4﹣6= 4.98+0.02= 1÷0.01=（）×72= 25÷5==
直接写出结果． 960÷30= 1.5×40=60 9﹣3.4= 15÷2.5÷4=×25=÷=+= 1﹣+=
直接写出得数 18×40= 910÷70= 6.3÷0.1= 36×25%= 100×10= 35×0.1= 75﹣75×0.1====
+
= 24×
= 5﹣
=
÷
= 40×
=
=
﹣
=
÷0.4=
+
=
﹣
= 4.5×102= 341﹣103= 270÷18=
=
×6= 4.57+6.43= 7×
÷7×= 1÷
×
=﹣= 4.5×102= 341﹣103= 270÷18==×6= 4.57+6.43= 7×÷7×= 1÷×=
= 2÷
=
=
）×72=
=
×25=
÷
=
+
= 1﹣
+
=
=
=
=
粤公网安备 44130202000953号