①2x﹣4×0.5=4
②:=x:
+x=36 6.5:x=3.25:4
0.8×=
5.6÷=
11﹣+=
5×0.5÷5×0.5=
7.78+2.2=
73.17÷9.12≈
0.3752=
6.3:( )=0.9
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1.25×80%= = 1﹣0.375= 6÷0.2=
= 2.35+4.7= = 16×0.25=
= =