12×
=
24÷
=
.
是500克,这批大米是( )kg。1÷
=
+
=
÷
=
÷
=
×
=
+0.8=
÷1=
×
=
+
=
-
= 24÷
=
÷
=
÷
=
×
=
。( )
,这个数就扩大到原来的倍。
25%×36= 12÷
=
=
=
75%×16=
÷25%=
= 12
=


B .
C .
D . 不能确定
9
= 35×
=
×
=
=
=
÷4=
1﹣23%=
= 55×20%= 1﹣
=
+
= 60×
= 1.6÷0.2= 3.14×22 = 8÷
×3=
45×50%=
×
= 48÷
=
÷
=
×0.2÷
×0.2=
B .
C .
>×
×
÷5
×
÷ 
×
=
1.25×=
×
+
×

=
=
×2.5= 81÷90%=
÷12=
= 1
= 60×25%=
+
=
+
=
×
=
×
=
25×
=
÷5= 14÷
=
÷
=
×
=
改写成两道除法算式。
小时行了
千米,他每小时行千米,行1千米需要小时。
+
= 1-
= 1÷
=
-
=
×
= 0÷
= 0.9+99×0.9= 1220÷59≈
和
之间的是( )。
x
B .
÷
C .
×
D .
÷
99×7.2= 45×10.1=
÷
=
+
﹣
= 1.25×3.2×2.5=
28.9÷1.25÷0.8= 56.5×9.9+5.65= (2.5﹣0.25)×0.4=
78.2﹣8.2×1.3= 4.5÷1.5÷1.5=