求多边形的面积.(单位:厘米)
直接写出得数.
53+48= 0.7×1.4= 15.7÷3.14= 7﹣4.45=
24×=
+
=
﹣
=
÷7=
直接写出得数.
382﹣297=+
=
÷2= 3.8+6.2= 8.1÷3×2=
×33= 68﹣198= 0.65÷1.3= 75×10%= 0.75﹣(0.75+3.4)=
1÷= 1÷0.01=
﹣
=
+
×2= 48×(
﹣
)=
直接写出得数
73+827= 30﹣6.3= 0.4×0.25= 0.06÷0.6=÷12=
=
×
= 18×(
+
)=
直接写出得数
651﹣105= 0.65+2.35= 0.1×0.03=(0.27+0.9)÷0.9=
2﹣=
= 64÷0.08=
=
=
= 10﹣
﹣0.875
=
直接写出下面算式的结果
830﹣250= 0.34+0.66= 30﹣19.7= 6×1=
0.4×0.6= 1+
= 8.7÷100= 1÷
=
7﹣3=(
﹣
)÷21= 4×(
+
)=
+2×
﹣
=