最好是递等式计算谢谢!1)3.7×1.4×0.052)2.7×3.7+0.37×733)2.3×6.7-9.244)1.
3个回答

1)3.7×1.4×0.05

=3.7×0.07

=0.259

2)2.7×3.7+0.37×73

=3.7×(2.7+7.3)

=3.7×10

=37

3)2.3×6.7-9.24

=15.41-9.24

=6.17

4)1.25×23×1.6

=1.25×8×2.3×2

=10×4.6

=46

5)16.5×9.9

=16.5×(10-0.1)

=165-1.65

=163.35

6)0.64+0.36×0.25

=0.64+0.09

=0.73

7)3.9×7.8+39×0.12+3.9

=3.9×(7.8+1.2+1)

=3.9×10

=39

8)3.05-2.05×1.4

=1+2.05-2.05×1.4

=1-2.05×0.4

=1-0.82

=0.18