简便计算 2.61×1.4+8.6 1.25×7.3×0.8 19.4×3.7+19.4×6.3
问题描述：
简便计算 2.61×1.4+8.6 1.25×7.3×0.8 19.4×3.7+19.4×6.3
简便计算
2.61×1.4+8.6
1.25×7.3×0.8
19.4×3.7+19.4×6.3
1.2×3.3
9.6×0.5×2.5×0.125
24.3×120.5-2.05×243
1.3×7.4+2.6×6.3
答
2.61*（1.4+8.6）=2.61*10=26.1 1.25*0.8*7.3=1*7.3=7.3