直接写得数 0.22= 1÷0.01= 0.24×5= 0.8×0.125= 8.1﹣1.9=2.4+30= 3×0.5÷3×0.5= 11a﹣6a+5a= 7.8+2.4﹣1.8+1.6= 9﹣1.8﹣3.2=
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.