计算下面各题,能简算的要用简便方法计算.
40.2﹣4÷80×2.434×(
+
)×133.9﹣5.7+7.1﹣2.3
÷[
×(
﹣
)].
计算下面各题(能简算的要简算).
3﹣2.78﹣0.22101×99﹣99 0.32×6.7+3.2×0.33[
﹣(
+
)]÷
.
直接写出得数.
0.72÷0.09= 25÷20%= 98×101= 398+199=(25×0.25)×8=
2.9×4×0.5= 2.7÷
= 28
÷7=(2.4+3
)×
= 16
÷8=
(
+0.12)÷4= 1
×12﹣12×
= 7
÷7
= 4.4﹣4
= 7.75﹣(5.8﹣1
)=
(11.9+17.1)×
=
计算下面各题,能简算的必须简算.
(1)
÷
+
÷
(2)5
+2
+4
+6
(3)
×(1
+37.5% )﹣
÷1
(4)95.6×18﹣95
÷
(5)(
﹣
)÷[(5﹣2
)÷3
](6)(222+888)÷[5 6×(
﹣
)].
脱式计算
×(1÷
﹣
÷1)(80﹣9.8)×0.6﹣2.12(
+
)÷
﹣
(
+
)×72.