计算，能简算要简算9.5×1012.6×1.5+0.15×349.9÷0.5÷2.212.5×0.4×2.5×81994+199.4+19.94+1.994．

Question

计算，能简算要简算
9.5×101      
2.6×1.5+0.15×34      
9.9÷0.5÷2.2
12.5×0.4×2.5×8            
1994+199.4+19.94+1.994．

Answer 1

①9.5×101
=9.5×（100+1）
=9.5×100+9.5
=950+9.5
=959.5

②2.6×1.5+0.15×34
=2.6×1.5+1.5×3.4
=1.5×（2.6+3.4）
=1.5×6
=9

③9.9÷0.5÷2.2
=9.9÷1.1
=9

④12.5×0.4×2.5×8
=（12.5×8）×（0.4×2.5）
=100×1
=100

⑤1994+199.4+19.94+1.994
=1994×1+1994×0.1+1994×0.01+1994×0.001
=1994×（1+0.1+0.01+0.001）
=1994×1.111
=2215.34