①
②
③
④
86.4÷36=
1.57÷3.9≈保留两位小数)
☆7.59÷0.23=
0.25+0.5=
3.2-0.22=
1-0.07=
5.54+4.6=
0.87+0.06=
4-2.6=
0.37+0.3=
2+0.1-2+0.1=
①12.5×3.2
②6.45×5.8-6.45×1.8
③0.25×99
④0.28÷0.7×1.5
⑤23.9×0.25×8
⑥7.6×10.1
竹竿的高/m
1
2
3
4
5
竿影的长/m
0.4
0.8
1.2
1.6
2.0