直接写出得数：578+216= 18.25﹣3.3= 0.99×9+0.99= 3.2﹣= 2÷3=2×= ×8.1= 1×8+1×2= += 21÷7=
直接写得数． 130×7= 1.4÷0.2=﹢0.25= 1÷3×= 860÷2÷86= 6÷1%=﹣==
直接写出得数． 572﹣298= 0.75+99×0.75= 9.5+0.59= 250×0.04=== 76×99= 0.125×9×8== 0.56÷0.8×5== 15.73﹣（2.8+1.73）=
脱式计算（能简算的要简算）. （1）10.2×43（2）3.64÷4+4.36×25%（3）[﹣（）]×．
直接写出得数. 614﹣49.3=×38.57= 18×（﹣）= 3÷÷=÷0.16=+79×0.375= 1﹣1÷3= 0.81×÷0.81×=
口算. 2.2+3.57= 3.25×4= 6.75+0.25= 4÷10= 17÷1000= 0.63×10= 0.25×0= 0.56+0.4= 1.25×100=
= 2
÷3=
= 
×8.1= 1
×8+1
= 21
÷7=
﹢0.25= 1÷3×
=
﹣
=
=
=
= 76×99= 0.125×9×8=
= 0.56÷0.8×5=
= 15.73﹣（2.8+1.73）=== 76×99= 0.125×9×8== 0.56÷0.8×5== 15.73﹣（2.8+1.73）=
﹣（
）]×
．
×38.57= 18×（
﹣
）= 3÷
÷
÷0.16=
+79×0.375= 1﹣1÷3= 0.81×
÷0.81×
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