4737 8890 23+525+3
8778 660 50+3053
-10=6 12- =9 +6=14
16- =8 +6=12 15-=7
-7=7 14- =5 18-=9
10+30> 20+<25
35+<40 46->40
+52<60 54-50>
642÷6= 0.9×99+0.9= 1.25×80= 2.5÷0.01=
÷ = 2﹣ ﹣ = 3﹣ ﹣ = ( ÷ )×30=