能简算的要简算.⑴3.4×12.5×0.15×8×2⑵1.25×4.6×8⑶3.14×9+3.14⑷4.5×2.6+4.5×7.4⑸125×0.74×0.08⑹2.86×0.5×4.6
+=
32×4=
372×4=
620×5=