简算:
(8.5﹣4)×(0.32÷1.6)(+
)×13×18
×9﹣6÷
×[1÷(
﹣
)].
运用运算定律或性质进行简算:
(1)26.74﹣(6.74+7.93)
(2)
(3)125×2.5×3.2.
怎样简便就怎样算.
(1)×2
+2
×
(2)101×0.48
(3)7.28﹣(1.25+0.28)
(4)19.9+19.9×99.
怎样简便就怎样算.
3280÷16+60018.75﹣6.2﹣3.8 25×(100+4)
3.75+4.5÷0.18×0.25 25×32×125(7.6×15+2.4×5)÷126.
递等式计算,能简算的要简算.
①4.8×3.9+6.1×4
②18 ﹣(2.35+8.6)
③320×125
④1.7+3.98+5.