简便计算
3.1+25.78+6.912.7﹣4.8﹣5.2
34.82﹣(4.82+15.2)15.25+4.72+4.75+5.28.
1.2×2.5+0.8×2.5=( + )× .
脱式计算(用自己喜欢的方法计算).
27×101287﹣154﹣4673×106﹣73×6
(320+120)÷(20﹣16)83+(420÷30+15)25×125×8×4.
怎样简便怎样算.
18.76×9.9+1.8763.52÷2.5÷0.43.65×10.1
1.25×2.5×323.9﹣4.1+6.1﹣5.9 3.75﹣(3.75+6.48)
15.6×13.1﹣15.6﹣15.6×2.1 56.5×9.9+5.65.
简便运算.
(+
+
)×105
×
+25%×
+0.25×
2
+3
﹣3
+1
+1
3.7×99+3.7.