口算.
1﹣37%= 50%×0.6= 9÷=0÷
=
4.9+45%=(+
)×7=
×
=
﹣
=
直接写出得数.
1﹣= 4×
= 10÷
= 72÷36%=
86%+1= 0.1÷1%= 4×2.5%= 4.5﹣75%﹣=
直接写出得数:
45%﹣=
÷
+5%=
×25%=
+15%=
×
=
÷
=
×
=
÷
=
(1)6×0.3=(2)=(3)
=(4)15×0.4=
(5)=(6)
=(7)
=(8)
=
口算:
3.14×2= 3.14×3= 3.14×4= 3.14×5= 3.14×6=
3.14×7= 3.14×8= 3.14×9= 3.14×2.7=+
=
4+= 2﹣
=
×
= 6÷
=
÷5=
×
=
﹣
= 3.14×2+3.14×0.7= + = .