517-209=
326+458=
8.18- 2.06 =
1.29+3.6=
3×214 =
630÷70 =
2.31×4 =
0.36÷0.4=
16+25=
80-0.8=
2700÷900=
0.63+0.03=
17.5-(18-2.5)=
46-4.5×8=
1 千米的7千米的 4.35×1.024.35 2
3÷12=
642÷81≈
705-455=
0.3×400=
①150+500=
②1.2+2.3=
③240-200=
④4.85-3.15=
⑤
⑥
⑦5.4÷0.9=
⑧2.5×0.4=
103-68=
×36=
37.42+ 6.38=
1-0.84=
0.8×12.5=
2.04÷4=
63.4-7.8-2.2=
×0=
①
②
1.5×1= 910÷70= 2.2﹣1.9= 6÷7= 435+199=
+= -= ÷= 20×= ×=
① × = ②24× = ③3× = ④1﹣ =
⑤ ÷2= ⑥2÷ = ⑦ ÷ = ⑧0÷ =
36× = 12× = × = ×3=
1÷ = ÷6= ÷ = 100÷10%=