脱式计算．（能简算的要简算）2.4+7.6×8.056.03×4.9+5.1×6.030.7÷0.8÷0.1252.5×40.42.5×0.9825.4×9.6-25.4+1.4×25.4

Question

脱式计算．（能简算的要简算）

2.4+7.6×8.05	6.03×4.9+5.1×6.03	0.7÷0.8÷0.125
2.5×40.4	2.5×0.98	25.4×9.6-25.4+1.4×25.4

Answer 1

（1）2.4+7.6×8.05
=2.4+61.18
=63.58

（2）6.03×4.9+5.1×6.03
=6.03×（4.9+5.1）
=6.03×10
=60.3

（3）0.7÷0.8÷0.125
=0.7÷（0.8×0.125）
=0.7÷0.1
=7

（4）2.5×40.4
=2.5×（40+0.4）
=2.5×40+2.5×0.4
=100+1
=101

（5）2.5×0.98
=2.5×2×0.49
=5×0.49
=2.45

（6）25.4×9.6-25.4+1.4×25.4
=25.4×（9.6-1+1.4）
=25.4×10
=254