7x+56=189 :x:
67﹣40=
15×6=
3.5÷7=
16+25=
-=
÷=
×21=
+=
①8×1.25=
②678+206=
③+=
④×7.2=
⑤3.2a﹣a=
⑥2.875+
⑦18.23﹣2.3=
⑧3÷=
⑨633÷91≈
⑩59×42≈
x
4
?
y
12
24