3 运动定律与简便运算
6÷=
×10%=
×8= 15÷1%=
1.05﹣=
÷
= (
﹣
)×
=
×
÷
×
=
+
X=2 X:
=12:
=0.5
÷(1﹣
)×
×
+40%×
÷(
+
) (
+
)×
+
.
脱式计算
(1)49××
(2)
×12 (3)36×(
+
)
(4)10.5÷10.5× (5)(1+
)÷(1﹣
) (6)2.5×3
×0.4×
(7)×
÷
(8)(
)÷
(9)1.4×3.7+3.7×8.6.