3.68乘以2.6+5.2乘以1.32-1.3乘以4简算

3.68*2.6+5.2*1.32-1.3*4
=3.68*2.6+2.6*2*1.32-1.3*2*2
=(3.68+2*1.32-2)*2.6
=(5-0.68)*2.6
=(5-0.7+0.02)*2.6
=13-1.82+0.052
=11.232