Question

脱式计算（能简算的要简算）2.5×7.1×4 16.12×99+16.12 &nb...

脱式计算（能简算的要简算）2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9×4.8 26×15.7+15.7×24 2.275+0.625）×0.28 64-2.64×0.5

Answer 1

（1）2.5×7.1×4
=（2.5×4）×7.1
=10×7.1
=71

（2）16.12×99+16.12           
=16.12×（99+1）
=16.12×100
=1612

（3）5.2×0.9+0.9×4.8
=（5.2+4.8）×0.9
=10×0.9
=9

（4）26×15.7+15.7×24    
=（26+24）×15.7
=50×15.7
=785

（5）（2.275+0.625）×0.28
=2.9×0.28
=0.812

（6）64-2.64×0.5
=64-1.32
=62.68