下列各题,能用简便的要用简便方法计算.
①17.25+3.05+2.75+3.95②24×(+
﹣
)
③×(
×17﹣
)④(
﹣
)×(
+
)
①1.25×0.25×0.8×4 ②29.8﹣(9.8+2.99÷2.3)
③(﹣15.3)×
×2.4 ④1.75×0.25+0.25×6.25
⑤( +
)×8+
.
递等式计算.(能用简便算法的用简便方法计算)
1.5×1052.33×0.5×424.6+18.7+15.4
1.2×2.5+0.8×2.52.05÷0.82+33.6 9.07﹣22.78÷3.4.
3.65×4.36+6.64×3.65﹣3.65.
计算下面各题,能简算的要简算:
(+
)×12+
×0.75+
×
(
+40%)×
﹣
69.4﹣5.185÷1.7﹣13.9×0.5.