（1）2.2+0.8=（2）6÷×=（3）0.3××3=（4）25÷=（5）1÷125%=（6）0×=（7）3.2×125×25=（8）222+78=
直接写出得数÷= 20×=÷=﹣= 12÷50%= 3﹣﹣= 60×20%=÷26=+= 1﹣3%=
直接写出得数×4= 6﹣=÷= 6÷1%= 1÷=×=×0÷= 10+×=××5×7= 0.99×9+0.99=
直接得数．×21=×= 15÷=÷ 1﹣65%= 1+65%=÷=×=
直接写得数．×=×=×=×2= 5﹣= 12×= 1÷=+×=（6+）×=×39×=
口算下面各题．÷8=×= 5÷= 3+3÷7=×15= 10÷10%= 28×75%=×8×=
×
=
=
=
÷
= 20×
÷
=
﹣
=
= 60×20%=
÷26=
+
= 1﹣3%=
×4= 6﹣
=
÷
= 6÷1%=
=
×
=
×0÷
×
=
×
×5×7= 0.99×9+0.99=
×21=
×
= 15÷
=
÷
÷
=
×
=
×
=
×
=
×
=
=
= 1÷
=
+
×
=（6+
）×
×39×
=
÷8=
×
= 5÷
= 3+3÷7=
×15= 10÷10%= 28×75%=
×8×
=
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