47.54-6.84=
23.6+14.83=
48×320= 306×50= 24×645=826×48= 207×89= 450×58=
0.03+0.52= 3-0.3= 2.5×0.4= 0.4×0.7=
2-=
+0.125=
33=
3÷42=
4+=
1-
验算: