Question

脱式计算．（能简算的要简算）8.09×1.4-1.63.76×0.25+25.83.7×6.3+3.7×3.77.3×101-7.30.125×（8+1.

脱式计算．（能简算的要简算）8.09×1.4-1.63.76×0.25+25.83.7×6.3+3.7×3.77.3×101-7.30.125×（8+1.6）0.49×199+0.492.5×32×1.253.2×100.1．

Answer 1

①8.09×1.4-1.6
=11.326-1.6
=9.726

②3.76×0.25+25.8
=0.94+25.8
=26.74

③3.7×6.3+3.7×3.7
=3.7×（6.3+3.7）
=3.7×10
=37

④7.3×101-7.3
=7.3×（101-1）
=7.3×100
=730

⑤0.125×（8+1.6）
=0.125×8×（1+0.2）
=1×1.2
=1.2

⑥0.49×199+0.49
=0.49×（199+1）
=0.49×200
=98

⑦2.5×32×1.25
=2.5×（4×8）×1.25
=（2.5×4）×（1.25×8）
=10×10
=100

⑧3.2×100.1
=3.2×（100+0.1）
=3.2×100+3.2×0.1
=320+0.32
=320.32