23除以7,如果被除数和除数都扩大10倍,那么商是 ,余数是 .
28.4×13﹣325.62÷8.1 312.56﹣13.49﹣(16.51﹣81.44)9.7+3.6÷0.8×1.3﹣1.3 45.8×7.36+45.8+1.64×45.810﹣(0.81+0.9×5.1)÷1.2[9.7+(7.2﹣5.52)÷1.4]×0.6.
计算下面各题,能简算的要简算.2.25×4.8+77.5×0.48 63×﹣×63 4÷×(﹣) (+)××.
脱式计算下面各题,怎样简便就怎样算.5.2×39.8 3.8×1.4+6 270.4÷(41﹣28.5)÷0.8.
计算(1)0.625×4+3÷0.4 (2)4×3.09×0.25 (3)(27.5×0.75﹣3.405)÷0.8(4)4.02÷[(1﹣0.4)÷0.1] (5)(50﹣20×0.1)÷0.01 (6)18.75﹣0.43﹣4.57.
脱式计算.(能简算的要简算)28.76﹣4.37﹣5.6358×0.37+0.37×428.27﹣5.84+1.73﹣2.16516÷(36×11﹣353)