12乘130乘5怎么用简便方法计算

Question

如题所述

Answer 1

12乘130乘5怎么用简便方法计算

12乘130乘5
=12×5×130
=60×130
=7800

4.32乘8.24 43.2乘0.176怎么用简便方法计算

4.32×8.24+43.2×0.176
=4.32×8.24+4.32×1.76
=4.32×（8.24+1.76）
=4.32×10
=43.2

1.25乘4.63怎么用简便方法计算

1.25x4.63
=1.25x(4.64 -0.01)
=1.25x(8x0.58 -0.01)
=(1.25x8)x0.58 -0.00125
=10x0.58-0.00125
=5.8-0.00125
=5.79875

88乘89怎么用简便方法计算

88X89
=88X(90-1)
=88X90-88
=90X90-2X90-88
=8100-180-88
=8100-268
=8100-300+32
=7832

321乘98减320乘97怎么用简便方法计算

321×98一320×97
=(320+1)×98一320×(98一1)
=320x98+98一320×98+320
=98+320
=(100一2)+320
=420一2
=418

321×98﹣320×97=321×(100-2)﹣320×(100-3)
＝321×100﹣321×2﹣320×100＋320×(2+1)
＝(321-320)×100﹣(321-320)×2＋320×1
＝1×100﹣1×2＋320
＝418

6666乘1212减2222乘2636怎么用简便方法计算

6666×1212-2222×2636
=2222×（3636-2636）
=2222×1000
=2222000

199乘99 99怎么用简便方法计算

199×99+99
=99×(199+1)
=(100-1)×200
=20000-200
=19800
祝你好运

32乘125怎么用简便方法计算啊？

32×125
=4×8×125
=4×1000
=4000

2.25乘101减22.5怎么用简便方法计算

2.25x101-22.5
=2.25x(100+1)-22.5
=2.25x100+2.25-22.5
=204.75
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