【用简便方法计算1.25*4*2.5.0.89.06*9+9.0625*1.68.98*101<5.>1.25*.3.69+3.69*994.52*9.9+0.4520.125*32*32*0.2519.8*4-9.8*4*1.250.25*1.5*403.6*5.8-36*0.08】
用简便方法计算1.25*4*2.5.0.89.06*9+9.0625*1.68.98*1011.25*
.3.69+3.69*994.52*9.9+0.4520.125*32*32*0.2519.8*4-9.8*4*1.250.25*1.5*403.6*5.8-36*0.08
1.25×4×2.5×0.8
=（1.25×0.8）×（4×2.5）
=1×10
=10
9.06×9+9.06
=9.06×（9＋1）
=9.06×10
=90.6
25×1.6
=（25×4）×0.4
=100×0.4
=40
8.98×101
=8.98×（100＋1）
=8.98×100＋8.98
=898＋8.98
=906.98
1.25×（0.8+0.4）
=1.25×0.8＋1.25＋0.4
=1＋0.5
=1.5
3.69+3.69*99
=3.69×（1＋99）
=3.69×100
=369
4.52*9.9+0.452
=4.52×9.9＋4.52×0.1……………变一变就简便
=4.52×（9.9＋0.1）
=4.52×10
=45.2
0.125*32*32*0.25……………变一变就简便
=（0.125×8）×32×（4×0.25）
=1×32×1
=32
19.8*4-9.8*4
=4×（19.8－9.8）
=4×10
=40
*1.25
=8.8×1.25
=1.1×（8×1.25）
=1.1×10
=11
0.25*1.5*40
=（0.25×40）×1.5
=10×1.5
=15
3.6*5.8-36*0.08
=3.6×5.8－3.6×0.8
=3.6×（5.8－0.8）
=3.6×5
=18
dajiaantadetiwenxie3.6*5.8-36*0.080.25*1.5*400.25*1.5*400.25*1.5*40
3.6*5.8-36*0.08……………变一变就简便=3.6×5.8－3.6×0.8=3.6×（5.8－0.8）=3.6×5=180.25*1.5*40=（0.25×40）×1.5=10×1.5=150.25*1.5*40=（0.25×4）×（1.5×10）=1×15=15