直接写得数：2.8+6.2= 0.7+0.5= 1.6﹣0.6= 7.3+0.7=0.6+5.4= 0.6﹣0.1= 0.9+0.3= 1﹣0.9=
直接写出得数． 1﹣9=+0.2=+﹣0.2= 5÷= 3.6×=×1.5=﹣= 1÷=×15= 4.5+= 2.43+4.57=﹣=×1.2= 2.5﹣= 5﹣1﹣1.6=÷= 2×0=（0.18×）÷9= 0.2 5×4=÷= （+）×12=
直接写得数．+=×18=﹣=××8=×=÷6=÷=（+）×24=÷= 24×25% 0÷×÷×=
直接写出得数 0.12======×÷=×÷×=
直接写得数． 9×=÷=÷=÷5÷=÷=×=÷25= 5÷÷= 12÷=﹣=﹣=×÷=
口算===×9=÷12==== 7.8×9+7.8=×0= 24×（）= 12×=
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