0.98×101
=0.98*（100+1）
=0.98*100+0.98
=98+0.98
=98.98
9.07-22.78÷3.4
=9.07-6.7
=2.37
0.125×3.2×0.25
=0.125*8*0.4*0.25
=（0.125*8）*（0.4*0.25）
=1*0.1
=0.1