直接写数对又快:
(1)47.23﹣(7.23+5.89)=(2)﹣
﹣
=(3)12.5×8.8÷11=
(4)(+
)×12=(5)
×
+40%×
=(6)
÷5+5÷
=
(7)99+999+9999+99999=(8)×
+1.25×
+125%=
脱式计算.
①1.3×2.5÷0.65②2.65﹣0.87﹣3.13+4.35③×
+
×
④
÷[
﹣(1﹣
)].
计算:
3.25÷0.25÷0.412.5×5.60.98+9×0.98.
用递等式计算(能简算的要简算)
①(+
)÷(1﹣
×
)②3.2×1.25+4.8×1
③[(5﹣4
)÷1
]×25%④
+(
﹣
)÷
.
[5.7﹣4.8×(480%﹣3.8)]÷0.45.