算一算×3= ×10= ×2= ×5=×14= ×12= ×100= ×38=×11= ×2= ×5= ×4=×0= ×105=
计算,能简算的要简算.(4﹣7.5×)÷ 0.25÷+0.25× 2.8×+1.2÷45÷[72×()] 7.2+[(7.8+)÷0.4] .
下面各题,怎样简便就怎样算.(0.86+0.86+0.86+0.86)×25 0.2+(3.4+)×7.6×÷[1.9﹣1.9×(1.9﹣1.9)] 74×19+19×25.4.
神机妙算:(怎样简便就怎样算)4+16÷ ÷×64﹣1 ×[﹣(﹣)]×0.53+75%×1.47 25×3.2×1.25 ÷.
递等式计算,怎样简便就怎样算.①×÷ ②(﹣)× ③0.75÷(+)④3﹣÷﹣ ⑤7.8×101 ⑥(﹣)×(﹣)
19+2.4+2.91+14.6 ×153﹣0.6×53 80.7×8.7+8.07×13. 21÷(+)÷ ÷[(﹣)÷]