0.42×0.5=0.21 0.51÷1.7=0.3 5.2÷0.13=40 99×1.01=99.99
13.5-2.8-7.2=3.5 32.8+19=51.8 1.06×0.4=0.424
2
5 +
3
5 =1 1-
7
8 =
1
8
25×0.32×125=1000
0.42×0.5=0.21 0.51÷1.7=0.3 5.2÷0.13=40 99×1.01=99.99
13.5-2.8-7.2=3.5 32.8+19=51.8 1.06×0.4=0.424
2
5 +
3
5 =1 1-
7
8 =
1
8
25×0.32×125=1000