0.03+0.52= 3-0.3= 2.5×0.4= 0.4×0.7=
18×2=
45÷9=
280+70=
0÷42=
12×6=
84-14=
45×0=
25×8=
197-12×9+61 38+160÷(40-30)
240×[64-(95-39)] (55+250)÷(30-25)
0.850.805 10.9×0.810.9
0.26×1.22.6×0.21 4.53×0.994.53-4.53×0.01
■□□□□→1,□■□□□→2,■■■□□→7=1+2+4,■□■□■→21=1+4+16
□□■■■→■■□■□→
□□□□□→5
□□□□□→13
205+97= 3.01﹣0.1= 0.25×3×4= 36×25%=
3×a×a= ×1.6= 4÷25%= 16.4+3.06=
1﹣ ÷ = ( ﹣ )÷ =