28×301≈ 0.33= 425-199= 557÷69≈ 5.2÷0.125÷8=
÷ = + = 8.2-2= 7- = ×0÷3=
0.52-0.42=
5÷20%=
5m:35cm(求比值)=
①8.75- 8.57+(11.25- 1.43)
②0.999×0.7+0.111×3.7
③875×0.25+ ×76-8.75
④2018×2018-2017×2019
⑤4123+3412+2341+1234
⑥199÷
⑦×2020
⑧
⑨
⑩
时间/时
1
2
3
5
路程/km
60
120
240
360
答:
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