7.2×0.2 = 10.02-5.96≈ 1÷0.125 =
0.45×0.5÷0.5 = 0.5+2.5×0.4= 4.7÷470 =
1.2×7= 13.2×0.2= 0.001÷0.1= 18.7×0×4=
8÷5= 2.4×5= 420×0.05= 0÷2.5×4=
原数
保留一位小数
保留两位小数
8.666...
9.03636...
3.995995...
6.1×10= 6.4+4= 2.8×0.5= 1-0.25=
0.37+0.63= 4.5+100= 0.05×40= 0.52=
2.5×0.4= 1.25×0.8= 7.5÷0.5= 0.8÷5=
20.6-7.4-2.6= 3.9-0.4×0.25= 1.6×5+1.6= 8×(1.2+0.05)=
3.85×0.7 3.85÷0.7
2.622.6×2
4.36×0.5 0.436×5
树高/m
1
2
4
6
7
影长/m
0.8
1.6
3.2
4.8
5.6
0.71 1.5小时90分