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）=
直接写出得数=== 3×===== 8×==
直接写出得数．=====×+=﹣=+=
直接写数对又快： 1÷=+=÷=（﹣）×18=÷3=×=﹣=×÷×=
5.8+3=×= 6÷= 1÷﹣÷1= 2×10= 1÷3= 0.66÷= 1÷1+= 9÷3= 1÷0.8= 5.4×=×0.7+0.3=
直接写出得数．×1.2= 1÷2= 1.8÷=×÷×= （+﹣）×12= 3﹣÷0.75= 24÷8= 4÷﹣÷4=
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= 
= 76×99= 0.125×9×8=
= 0.56÷0.8×5= 
= 15.73﹣（2.8+1.73）=
=
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= 1.8÷
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÷0.75= 24
÷8= 4÷
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