32×30= 850÷170= 30﹣25×8=600÷12= 560÷28= 90﹣60÷30=99×101= 15×5= 33×99+33=
①②③④⑤⑥⑦⑧ （1）商大于被除数的有 它们的除数都 ． （2）商等于被除数的有 它们的除数都 ． （3）商小于被除数的有 它们的除数都 ．
计算 21÷121÷．
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÷=
②
③
④
⑤
⑥
⑦
⑧
121÷
．
×0.25=
÷
= 2×
÷
=
÷
= 2﹣
﹣
= 2.6×11﹣2.6= 1.8×4×0.5=
=
=
=
=
=
=
=
=
=
×
×
= 12×
=
+3=
÷
=
÷4=
×
= 5÷
=
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