直接写出得数：1300﹣497= 0.81+15.3= 1÷0.04= 6.3÷10%=6298÷68≈ 0.32= ÷0.75= 1÷3×=
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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