计算，能简算的要简算．2.45×6.3+2.45×3.73.06×1.5+2.082.5×1.25×0.322.73+0.27×1.52.64÷5÷0.23.8×3.2+3.8×7.8-3.8

Question

计算，能简算的要简算． 2.45×6.3+2.45×3.7	3.06×1.5+2.08	2.5×1.25×0.32
2.73+0.27×1.5	2.64÷5÷0.2	3.8×3.2+3.8×7.8-3.8

Answer 1

（1）2.45×6.3+2.45×3.7
=2.45×（6.3+3.7）
=2.45×10
=24.5
（2）3.06×1.5+2.08
=4.59+2.08
=6.67
（3）2.5×1.25×0.32
=2.5×1.25×0.8×0.4
=（2.5×0.4）×（1.25×0.8）
=1×1
=1
（4）2.73+0.27×1.5
=2.73+0.405
=3.135
（5）2.64÷5÷0.2
=2.64÷（5×0.2）
=2.64÷1
=2.64
（6）3.8×3.2+3.8×7.8-3.8
=3.8×（3.2+7.8-1）
=3.8×10
=38