60÷6= 48+37= 0÷24= 1400﹣700= 10000﹣8000=
66÷3= 75﹣68= 84÷4= 500+4000= 6×50=
计算下面各题,怎样简便就怎样计算.
①15.28+
﹣(
)
②(
﹣
)÷(1÷25%﹣
)
③
④(1﹣
)×
÷
.
用递等式计算,能简便的要简便
4.2﹣
+
﹣
7.77×(31.08÷7.77) 500﹣298[(1﹣
)÷
+1.4]×
101×
﹣
99×
÷
+
×
×
+
×
.
脱式计算,能简算的要简算.
15.8﹣
+14.2﹣
3
÷
+
×1
6.6﹣1
+(87.5%÷
+
×0.8)197×
+
.
口算.
3.5÷0.07=25%+1
=
×2.4=38×10.1=
8: =
×
÷
×
=3×9×(
+
)=13
﹣(6
+0.5)=
脱式计算:
(1)(2.34﹣3.25×6.4)÷6.5(2)
×[
﹣(
﹣
)]
(3)36×(
﹢
﹣
)(4)3.25×9.8+0.325×2.