脱式计算.(能简算的要简算)
①52.8﹣52.8÷(3.9﹢2.7) ②(3417÷17﹣42)×28 ③(
﹣
)÷
④
×[
﹣(
﹣
)] ⑤
×0.79+
×0.21 ⑥0.5×2.5×12.5×64.
怎样简便就怎样计算.
(
+
)×24×153.7×
+5.3×0.75+
.
9.9+99.9+999.96.8÷4﹣1.2×25%+4
×0.25.
0.34×12.5+0.125×66=103×0.3=4.34÷0.25÷4=
130130÷11111×66666=40.5×1.1﹣4.05=100﹣98+96﹣94…+4﹣2=
用简便方法计算
574+498487﹣305395﹣395733+260+67
998+98+82596﹣68﹣432786﹣299﹣98237﹣196+63﹣4.
9999×10001﹣9996×10002= .
计算(能简算的一定要简算)
(1)333387
×79+790×66661
(2)39
+137×1
.