急需简便运算题,只要简便运算,我有急用!合我意追+分

1.2×2.5+0.8×2.5 ...8.9×1.25-0.9×1.25
12.5×7.4×0.8 ...9.9×6.4
（12.5+1.25）×8 ...6.5×9.5+6.5×0.5
3.2×0.25 ...89.3×43+8.93×57
0.25×8.6×4 ...6.72-3.28-1.72
0.45+6.37+4.55 ...5.4+6.9×3
（25-2.5）×4 ...1846-620-380
4.8×46+4.8×54 ...0.8+0.8×2.5
1.25×3.6×8×2.5 ...12.5×2.4
28×12.5-12.5×20 ...23.65-（3.07+3.65）
（4+0.4）×0.25 ...8×7×1.25
1.65×99+1.65 ...27.85-（7.85+3.4）
48×1.25 ...50×1.25×0.2×8
7.8×9.9+0.78 ...10.1×7.5
1.2×2.5+0.8×2.5 ...8.9×1.25-0.9×1.25
12.5×7.4×0.8 ...9.9×6.4
（2.5+0.24）×4 ...6.5×9.5+6.5×0.5
3.2×0.25 ...0.35×1.6+0.35×3.4
0.25×8.6×4 ...6.72-3.28-1.72
0.45+6.37+4.55 ...5.4+6.9×3
（25-2.5）×4 ...1846-620-380
4.8×46+4.8×54 ...0.8+0.8×2.5
1.25×3.6×8×2.5 ...12.5×2.4
28×12.5-12.5×20 ...23.65-（3.07+3.65）
（4+0.4）×0.25 ...8×7×1.25
1.65×99+1.65 ...27.85-（7.85+3.4）
48×1.25 ...50×1.25×0.2×8
7.8×9.9+0.78