脱式计算:(能简算的要写出主要简算步骤)①(+)×24 ②1080﹣63.58﹣36.42 ③(+)÷(﹣)④×[﹣(﹣)] ⑤+÷× ⑥9.05×37+64×9.05﹣9.05.
直接写得数×0.25= ÷= 2×÷= 6.3×=÷= 2﹣﹣= 2.6×11﹣2.6= 1.8×4×0.5=
口算我最棒!= = = == = = ==
口算×= ×= 12×= +3=÷= ÷4= ×= 5÷=
直接写得数= = == = =
带分数除法.(1)例:4÷1=÷= = 分数除法中有带分数的,先把带分数化成 ,然后 .(2)试一试.16÷1 ÷1 4÷5 ÷12÷1 6÷ 1×3 2﹣.