(1)7.74×(2.8﹣1.3)+1.5×2.26(2)2.22×9.9+6.66×6.7
(3)(1.04×8.05)÷(3.24÷32.4)(4)1.8÷[(9.8﹣4.6)÷0.13﹣39.6]
(5)3.85×1.2+98×0.385﹣3.85(6)15.6×13.1﹣15.6﹣15.6×2.1.
脱式计算,能简便计算的要简算.
(1)13÷0.4÷2.5(2)64×4.5+36×4.5
(3)1.25×2.5×0.8(4)1.5×101﹣1.5
(5)14.64+3.7×2.8(6)2.8×7.3+0.27×28.
0.79+0.79×99=1÷5+1÷5=0.89×101﹣0.89=2﹣0.64﹣0.36=
1.1﹣2.7÷27=12.4×11﹣12.4=1.25×3.3×0=20﹣3.7﹣7.3=
5×0.75÷1.5×0.75=1﹣0.1×0.1=6×0.125×8=1×0.4÷1×0.4=
脱式计算(能简算的要简算)
12.65﹣(3.65+8.5)7.8+9+7.84.82﹣0.25+1.25+0.25
9.99﹣4.81.36+6.7+4.31.36﹣1.36+25.2.
下面各题怎样简便就怎样算.
(1)×
÷
(2)24×(
+
)(3)3﹣
÷
﹣
(4)×
+
÷7(5)
÷[
×(
+
)].